Primary Education Attainment by Country (2026)

Primary education attainment measures the percentage of adults aged 25 and older who have completed at least some primary education. This fundamental indicator reflects a population's basic educational foundation, representing the most essential level of formal schooling that provides literacy, numeracy, and foundational knowledge necessary for participation in modern society.

Understanding Primary Education Attainment

Primary education attainment represents the share of the adult population (25+ years) that has received at least some formal elementary education. This includes individuals who started primary school but may not have completed it, as well as those who finished primary education and continued to higher levels. A rate of 80% means that 8 out of 10 adults in the population have had some exposure to formal primary education. This indicator serves as a crucial measure of a country's historical educational development and current human capital foundation. Unlike enrollment rates that show current educational participation, attainment rates reflect the cumulative educational achievements of past generations and change very slowly over time as older, less-educated cohorts are replaced by younger, more-educated ones.

Primary Education Attainment by Country (2026)

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#	Country	2026 Estimate (%)
1	Albania AL	100%
2	Antigua and Barbuda AG	100%
3	Australia AU	100%
4	Austria AT	100%
5	Azerbaijan AZ	100%
6	Barbados BB	100%
7	Belarus BY	100%
8	Belgium BE	100%
9	Bulgaria BG	100%
10	Canada CA	100%
11	Croatia HR	100%
12	Czech Republic CZ	100%
13	Denmark DK	100%
14	Estonia EE	100%
15	Finland FI	100%
16	France FR	100%
17	Germany DE	100%
18	Greece GR	100%
19	Hungary HU	100%
20	Iceland IS	100%
21	Ireland IE	100%
22	Israel IL	100%
23	Italy IT	100%
24	Japan JP	100%
25	Kazakhstan KZ	100%
26	Latvia LV	100%
27	Lithuania LT	100%
28	Luxembourg LU	100%
29	Malta MT	100%
30	Netherlands NL	100%
31	Norway NO	100%
32	Portugal PT	100%
33	Romania RO	100%
34	Russia RU	100%
35	San Marino SM	100%
36	Slovakia SK	100%
37	Slovenia SI	100%
38	Spain ES	100%
39	Sweden SE	100%
40	Switzerland CH	100%
41	Ukraine UA	100%
42	United Kingdom GB	100%
43	United States US	100%
44	Uzbekistan UZ	100%
45	Armenia AM	99.9%
46	Kiribati KI	99.9%
47	Turkmenistan TM	99.9%
48	Poland PL	99.8%
49	Qatar QA	99.8%
50	Serbia RS	99.8%
51	Curaçao CW	99.7%
52	Moldova MD	99.7%
53	Georgia GE	99.6%
54	Namibia NA	99.6%
55	Uruguay UY	99.6%
56	Argentina AR	99.4%
57	Chile CL	99.3%
58	Saint Vincent and the Grenadines VC	99.3%
59	Kyrgyzstan KG	99.2%
60	Trinidad and Tobago TT	99.2%
61	Montenegro ME	99.1%
62	Saint Lucia LC	99%
63	Tonga TO	99%
64	Turks and Caicos Islands TC	99%
65	Jamaica JM	98.9%
66	United Arab Emirates AE	98.8%
67	Bahamas BS	98.5%
68	Indonesia ID	98.5%
69	Philippines PH	98.5%
70	Seychelles SC	98.4%
71	Bosnia and Herzegovina BA	98.3%
72	North Macedonia MK	98.3%
73	Palau PW	98.3%
74	Brunei BN	98.2%
75	Cuba CU	98.2%
76	South Korea KR	98.2%
77	Paraguay PY	98.1%
78	Samoa WS	98.1%
79	Tajikistan TJ	98%
80	Fiji FJ	97.8%
81	Palestine PS	97.8%
82	Grenada GD	97.7%
83	Tuvalu TV	97.7%
84	Cyprus CY	97.6%
85	Guyana GY	97.6%
86	Macau MO	97.2%
87	South Africa ZA	97.2%
88	Sri Lanka LK	97.2%
89	Vietnam VN	97.1%
90	Aruba AW	97%
91	Venezuela VE	96.9%
92	Costa Rica CR	96.8%
93	Panama PA	96.8%
94	Nauru NR	96.6%
95	China CN	96.5%
96	Mongolia MN	96.5%
97	Mauritius MU	96.3%
98	Zimbabwe ZW	96.3%
99	Dominica DM	96.2%
100	Thailand TH	96.1%
101	Kuwait KW	96%
102	Bolivia BO	95.8%
103	Ecuador EC	95.5%
104	Bahrain BH	95%
105	Belize BZ	95%
106	Brazil BR	95%
107	Colombia CO	95%
108	Dominican Republic DO	95%
109	Jordan JO	95%
110	Lebanon LB	95%
111	Marshall Islands MH	95%
112	Mexico MX	95%
113	Peru PE	95%
114	Saudi Arabia SA	95%
115	Suriname SR	95%
116	Zambia ZM	94.9%
117	Sao Tome and Principe ST	94%
118	Solomon Islands SB	94%
119	Eswatini SZ	93.9%
120	Lesotho LS	93.2%
121	Micronesia FM	93.2%
122	Türkiye TR	93.2%
123	Vanuatu VU	92.7%
124	Botswana BW	91.9%
125	Congo CG	91.8%
126	Myanmar MM	89.8%
127	Cape Verde CV	89.3%
128	Uganda UG	89.2%
129	Honduras HN	88.9%
130	Iran IR	88.9%
131	El Salvador SV	88.8%
132	Cambodia KH	88.1%
133	Malaysia MY	87.9%
134	Kenya KE	87.3%
135	DR Congo CD	86.4%
136	Rwanda RW	85.8%
137	Malawi MW	85.6%
138	Oman OM	85.5%
139	Tunisia TN	84.8%
140	Angola AO	83%
141	Laos LA	82.8%
142	Madagascar MG	82.2%
143	Iraq IQ	82.1%
144	Tanzania TZ	82%
145	Maldives MV	80.5%
146	Syria SY	80.3%
147	Algeria DZ	79.4%
148	Cameroon CM	78.9%
149	Egypt EG	78.6%
150	Papua New Guinea PG	77.6%
151	India IN	77.2%
152	Guatemala GT	76.9%
153	Ghana GH	76.7%
154	Nigeria NG	76.4%
155	Bangladesh BD	75%
156	Mozambique MZ	71.6%
157	South Sudan SS	71.3%
158	Haiti HT	71.2%
159	Central African Republic CF	69.9%
160	Togo TG	66.3%
161	Liberia LR	64.8%
162	Comoros KM	64.4%
163	Timor-Leste TL	63.5%
164	Nepal NP	63.2%
165	Mauritania MR	59.4%
166	Morocco MA	59.4%
167	Yemen YE	58.8%
168	Gambia GM	57.9%
169	Burundi BI	56.1%
170	Pakistan PK	55.8%
171	Sudan SD	54.5%
172	Guinea-Bissau GW	52.8%
173	Ethiopia ET	52.7%
174	Ivory Coast CI	52.2%
175	Bhutan BT	49.8%
176	Sierra Leone SL	47.5%
177	Djibouti DJ	46.8%
178	Senegal SN	44.8%
179	Benin BJ	43.7%
180	Chad TD	43.6%
181	Guinea GN	37.5%
182	Burkina Faso BF	37%
183	Mali ML	33.3%
184	Afghanistan AF	29.6%
185	Niger NE	23.5%
186	Somalia SO	22.8%

Global Leaders in Primary Education

Developed nations dominate primary education attainment, with 47 countries projected to reach or maintain 100% rates by 2026. These include Australia, Canada, most European Union countries, and several post-Soviet states that achieved universal primary education during the 20th century. Countries like Albania, Austria, Belgium, and Bulgaria demonstrate the success of comprehensive educational systems implemented over decades. High-income countries consistently show rates above 95%, reflecting sustained investments in educational infrastructure, compulsory education laws, and economic development that enables families to send children to school rather than work. The Nordic countries, Western Europe, and North America represent regions where primary education became universally accessible generations ago.

Regional and Development Patterns

Sub-Saharan Africa shows the greatest variation and lowest average rates, with countries like Niger (23.5%), Somalia (22.8%), and Mali (33.3%) projected for 2026. These low rates reflect historical challenges including limited school infrastructure, poverty preventing school attendance, cultural barriers to education (particularly for girls), and recent conflicts disrupting educational systems. Post-Soviet countries generally maintain very high rates (95-100%) due to the emphasis on universal education during the Soviet era. Latin American countries show mixed performance, with most achieving 80-95% rates. Asian countries vary widely, from near-universal attainment in East Asia to significant gaps in South Asia and conflict-affected regions.

Factors Influencing Educational Attainment

Economic development strongly correlates with primary education attainment, as wealthier countries can invest in school infrastructure, teacher training, and social programs that support education. However, the relationship is complex—some middle-income countries achieve high attainment through prioritizing education spending, while some resource-rich countries lag due to governance challenges. Cultural and social factors significantly influence educational participation. Gender equality in education, cultural attitudes toward schooling, and the perceived economic value of education all affect attainment rates. Countries with strong traditions of valuing education, regardless of income level, often achieve higher rates than their economic development alone would predict. Geographic factors create additional challenges. Rural and remote populations often have limited access to schools, requiring children to travel long distances or leave home for education. Island nations and countries with difficult terrain face particular infrastructure challenges in providing universal access to primary education.

2026 Projections and Demographic Change

The projections reflect the slow-changing nature of adult educational attainment. Since this measures the 25+ population, improvements primarily occur through demographic replacement—older generations with limited educational opportunities being replaced by younger, more educated cohorts. Most changes are modest, averaging 1.5 percentage points globally. Countries with the largest projected increases include Chad (+9.6 points), Guinea (+9.6 points), and several other Sub-Saharan African nations where education expansion programs of the past two decades are beginning to show impact as educated youth enter the 25+ age group. However, even with these improvements, significant gaps persist. Conflict-affected countries like Afghanistan, Syria, and Somalia show minimal projected improvement due to ongoing disruptions to educational systems. These countries face the dual challenge of rebuilding educational infrastructure while addressing the educational gaps created by years of conflict.

Primary Education Attainment by Country (2026)

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#	Country	2019 (%)	2020 (%)	2021 (%)	2022 (%)	2023 (%)	2024 (%)	2026 Estimate (%)
1	Albania	97.68%	98.06%	97.91%	97.87%	100%	-	100%
2	Antigua and Barbuda	-	-	97.43%	-	100%	-	100%
3	Australia	99.75%	99.74%	99.62%	99.57%	100%	100%	100%
4	Austria	100%	100%	100%	-	-	-	100%
5	Azerbaijan	98.51%	-	-	-	99.94%	-	100%
6	Barbados	-	-	-	-	-	-	100%
7	Belarus	99.79%	-	-	-	-	-	100%
8	Belgium	100%	100%	100%	100%	100%	-	100%
9	Bulgaria	100%	100%	100%	100%	100%	-	100%
10	Canada	100%	100%	100%	100%	100%	100%	100%
11	Croatia	100%	100%	100%	100%	100%	-	100%
12	Czech Republic	100%	100%	100%	100%	100%	-	100%
13	Denmark	100%	100%	100%	100%	100%	-	100%
14	Estonia	-	-	100%	100%	100%	-	100%
15	Finland	100%	100%	100%	100%	100%	-	100%
16	France	100%	100%	100%	100%	100%	-	100%
17	Germany	100%	100%	100%	100%	100%	-	100%
18	Greece	98.72%	98.73%	100%	100%	100%	100%	100%
19	Hungary	100%	99.82%	100%	100%	100%	-	100%
20	Iceland	100%	100%	100%	100%	100%	-	100%
21	Ireland	100%	100%	100%	100%	100%	-	100%
22	Israel	100%	100%	100%	100%	100%	-	100%
23	Italy	100%	100%	100%	100%	100%	-	100%
24	Japan	-	99.89%	-	-	-	-	100%
25	Kazakhstan	99.87%	-	-	-	-	-	100%
26	Latvia	-	-	100%	100%	100%	-	100%
27	Lithuania	100%	100%	100%	100%	100%	-	100%
28	Luxembourg	100%	100%	100%	100%	100%	-	100%
29	Malta	-	-	-	-	-	-	100%
30	Netherlands	100%	99.19%	100%	100%	100%	-	100%
31	Norway	100%	-	100%	100%	100%	-	100%
32	Portugal	100%	100%	100%	100%	100%	100%	100%
33	Romania	98.74%	98.69%	98.87%	98.95%	100%	-	100%
34	Russia	-	-	-	-	-	-	100%
35	San Marino	-	99.88%	-	99.9%	-	-	100%
36	Slovakia	99.76%	100%	100%	100%	100%	-	100%
37	Slovenia	100%	100%	100%	100%	100%	-	100%
38	Spain	100%	98.47%	100%	100%	100%	-	100%
39	Sweden	-	-	-	-	-	-	100%
40	Switzerland	100%	100%	100%	100%	100%	100%	100%
41	Ukraine	100%	-	-	-	-	-	100%
42	United Kingdom	-	100%	100%	-	-	-	100%
43	United States	100%	99.68%	98.01%	99.68%	99.65%	100%	100%
44	Uzbekistan	100%	-	100%	-	-	-	100%
45	Armenia	99.87%	99.62%	99.84%	99.66%	99.65%	-	99.9%
46	Kiribati	96.54%	97.11%	-	-	99.38%	-	99.9%
47	Turkmenistan	99.69%	-	-	99.69%	-	-	99.9%
48	Poland	99.75%	99.73%	-	-	-	-	99.8%
49	Qatar	-	-	-	99.27%	-	-	99.8%
50	Serbia	98.86%	98.83%	99.03%	98.94%	99.21%	99.33%	99.8%
51	Curaçao	-	99.64%	-	-	-	-	99.7%
52	Moldova	99.42%	99.54%	99.57%	99.51%	99.53%	99.53%	99.7%
53	Georgia	99.24%	99.35%	99.37%	99.37%	99.37%	-	99.6%
54	Namibia	-	-	-	-	99.08%	-	99.6%
55	Uruguay	99.22%	-	-	99.33%	-	99.51%	99.6%
56	Argentina	-	-	-	-	-	-	99.4%
57	Chile	98.24%	98.67%	98.64%	98.57%	98.67%	98.78%	99.3%
58	Saint Vincent and the Grenadines	-	-	-	-	-	-	99.3%
59	Kyrgyzstan	-	-	-	-	98.98%	-	99.2%
60	Trinidad and Tobago	-	-	-	98.76%	-	-	99.2%
61	Montenegro	98.33%	98.58%	-	-	-	-	99.1%
62	Saint Lucia	96.44%	98.54%	-	-	-	-	99%
63	Tonga	99.15%	-	100%	-	98.59%	-	99%
64	Turks and Caicos Islands	98.49%	-	-	-	-	-	99%
65	Jamaica	-	-	-	98.49%	-	-	98.9%
66	United Arab Emirates	97.65%	-	97.83%	98.03%	97.74%	98.27%	98.8%
67	Bahamas	98.12%	-	-	-	-	-	98.5%
68	Indonesia	96.02%	95.61%	-	98.14%	98.04%	-	98.5%
69	Philippines	98.2%	98.11%	98.38%	98%	-	-	98.5%
70	Seychelles	-	-	-	-	97.98%	-	98.4%
71	Bosnia and Herzegovina	92.45%	95.04%	97.01%	97.46%	97.79%	-	98.3%
72	North Macedonia	97.94%	98.24%	98.17%	98.09%	-	97.82%	98.3%
73	Palau	-	97.76%	-	-	-	-	98.3%
74	Brunei	96.56%	96.46%	95.69%	97.19%	97.68%	-	98.2%
75	Cuba	97.73%	-	-	-	-	-	98.2%
76	South Korea	97.06%	97.14%	97.29%	97.46%	97.75%	97.88%	98.2%
77	Paraguay	96.72%	97.09%	-	-	-	97.64%	98.1%
78	Samoa	98.25%	-	-	97.73%	-	-	98.1%
79	Tajikistan	-	-	-	-	-	-	98%
80	Fiji	-	-	97.44%	-	-	-	97.8%
81	Palestine	96.13%	96.68%	96.89%	97.13%	-	97.27%	97.8%
82	Grenada	99.07%	99.09%	99.22%	-	97.16%	-	97.7%
83	Tuvalu	97.23%	-	-	-	-	-	97.7%
84	Cyprus	95.42%	99.29%	97%	97.41%	97.12%	-	97.6%
85	Guyana	97.1%	-	-	-	-	-	97.6%
86	Macau	-	-	-	-	-	-	97.2%
87	South Africa	94.94%	96.63%	96.34%	95.55%	95.75%	96.66%	97.2%
88	Sri Lanka	96.59%	96.51%	96.61%	96.72%	-	-	97.2%
89	Vietnam	-	95.32%	96.03%	96.53%	96.55%	-	97.1%
90	Aruba	-	-	-	-	96.48%	-	97%
91	Venezuela	-	-	-	-	-	-	96.9%
92	Costa Rica	-	96.33%	-	-	-	-	96.8%
93	Panama	95.46%	-	-	94.78%	96.34%	96.32%	96.8%
94	Nauru	-	-	-	-	96.07%	-	96.6%
95	China	-	95.99%	-	-	-	-	96.5%
96	Mongolia	95.92%	98.03%	96.08%	96.26%	96.05%	-	96.5%
97	Mauritius	95.42%	-	95.42%	97.1%	95.88%	-	96.3%
98	Zimbabwe	94.24%	-	94.88%	94.96%	95.75%	-	96.3%
99	Dominica	-	-	95.71%	-	-	-	96.2%
100	Thailand	95.15%	-	-	95.58%	-	-	96.1%
101	Kuwait	-	-	-	-	-	-	96%
102	Bolivia	92.56%	91.55%	92.87%	93.8%	95.25%	-	95.8%
103	Ecuador	-	94.17%	95.42%	94.98%	-	-	95.5%
104	Bahrain	-	98.01%	-	95.13%	95.06%	94.94%	95%
105	Belize	-	96.12%	-	93.65%	-	-	95%
106	Brazil	-	-	-	-	-	-	95%
107	Colombia	94.05%	94.65%	-	94.36%	94.48%	94.29%	95%
108	Dominican Republic	94.05%	-	-	-	-	-	95%
109	Jordan	91.88%	92.84%	92.6%	92.59%	93.94%	-	95%
110	Lebanon	-	-	-	-	-	-	95%
111	Marshall Islands	98.71%	-	94.61%	-	-	-	95%
112	Mexico	-	93.61%	-	-	-	-	95%
113	Peru	-	-	-	-	-	94.29%	95%
114	Saudi Arabia	92.48%	97.12%	-	91.28%	94.42%	94.77%	95%
115	Suriname	-	-	-	93.89%	-	-	95%
116	Zambia	-	-	-	-	92.93%	-	94.9%
117	Sao Tome and Principe	90.98%	-	-	-	-	-	94%
118	Solomon Islands	-	-	-	-	-	-	94%
119	Eswatini	-	-	90.97%	88.54%	91.92%	-	93.9%
120	Lesotho	-	-	-	-	-	92.22%	93.2%
121	Micronesia	-	-	-	-	-	-	93.2%
122	Türkiye	95.94%	-	90.42%	90.49%	91.16%	-	93.2%
123	Vanuatu	91.29%	88.52%	-	-	91.1%	-	92.7%
124	Botswana	88.07%	88.68%	89.25%	89.53%	89.87%	-	91.9%
125	Congo	-	-	-	-	-	-	91.8%
126	Myanmar	88.95%	-	-	-	-	-	89.8%
127	Cape Verde	-	-	-	-	-	-	89.3%
128	Uganda	90.15%	-	87.19%	-	-	-	89.2%
129	Honduras	89.2%	-	-	-	86.57%	87.87%	88.9%
130	Iran	85.11%	85.76%	86.39%	86.52%	86.89%	-	88.9%
131	El Salvador	84.69%	85.24%	-	-	86.79%	-	88.8%
132	Cambodia	79.1%	81.66%	79.21%	-	86.05%	-	88.1%
133	Malaysia	-	-	-	-	-	-	87.9%
134	Kenya	84.08%	83.47%	86.68%	86.36%	-	86.26%	87.3%
135	DR Congo	-	-	-	-	-	-	86.4%
136	Rwanda	81.74%	79.42%	82.65%	78.14%	83.55%	84.77%	85.8%
137	Malawi	-	82.57%	-	-	-	-	85.6%
138	Oman	-	-	-	-	-	-	85.5%
139	Tunisia	76.78%	-	-	-	82.76%	-	84.8%
140	Angola	79.41%	-	80.96%	-	-	-	83%
141	Laos	-	-	-	75.52%	80.84%	-	82.8%
142	Madagascar	-	-	79.21%	-	-	-	82.2%
143	Iraq	-	-	80.05%	-	-	-	82.1%
144	Tanzania	-	-	-	79.04%	-	-	82%
145	Maldives	-	-	-	-	-	-	80.5%
146	Syria	-	-	-	-	-	-	80.3%
147	Algeria	75.36%	-	-	-	-	-	79.4%
148	Cameroon	-	-	-	-	-	-	78.9%
149	Egypt	-	73.17%	77.03%	73.81%	75.63%	-	78.6%
150	Papua New Guinea	-	-	-	74.6%	-	-	77.6%
151	India	69.06%	68.04%	-	69.85%	74.17%	-	77.2%
152	Guatemala	74.13%	-	-	74.56%	76.96%	75.39%	76.9%
153	Ghana	-	-	64.07%	73.68%	-	-	76.7%
154	Nigeria	70.96%	-	69.59%	-	-	74.91%	76.4%
155	Bangladesh	71.22%	72.89%	71.55%	68.44%	72.05%	-	75%
156	Mozambique	-	60.92%	-	68.65%	-	-	71.6%
157	South Sudan	-	-	-	-	-	-	71.3%
158	Haiti	-	-	-	-	-	-	71.2%
159	Central African Republic	65.94%	-	-	-	-	-	69.9%
160	Togo	60.55%	-	-	63.27%	-	-	66.3%
161	Liberia	60.79%	-	-	-	-	-	64.8%
162	Comoros	-	-	57.15%	61.45%	-	-	64.4%
163	Timor-Leste	-	-	69.03%	59.5%	-	-	63.5%
164	Nepal	56.19%	-	59.16%	-	-	-	63.2%
165	Mauritania	-	-	-	-	-	-	59.4%
166	Morocco	-	-	-	-	-	-	59.4%
167	Yemen	-	-	-	-	57.61%	-	58.8%
168	Gambia	-	47.83%	-	-	53.89%	-	57.9%
169	Burundi	-	-	-	-	-	-	56.1%
170	Pakistan	49.54%	-	51.77%	-	-	-	55.8%
171	Sudan	-	-	-	50.5%	-	-	54.5%
172	Guinea-Bissau	-	-	-	-	-	-	52.8%
173	Ethiopia	40.28%	-	43.58%	47.92%	-	-	52.7%
174	Ivory Coast	-	-	-	-	-	-	52.2%
175	Bhutan	-	-	-	45.77%	-	-	49.8%
176	Sierra Leone	41.52%	-	-	-	-	-	47.5%
177	Djibouti	-	-	-	-	-	-	46.8%
178	Senegal	34.56%	-	-	35.77%	38.83%	-	44.8%
179	Benin	39.53%	-	45.26%	37.69%	-	-	43.7%
180	Chad	34.01%	-	-	-	-	-	43.6%
181	Guinea	-	-	-	-	-	-	37.5%
182	Burkina Faso	21.92%	-	28.01%	24.86%	18.76%	34.03%	37%
183	Mali	24.26%	21.04%	-	27.3%	-	-	33.3%
184	Afghanistan	-	22.67%	25.73%	28.1%	-	-	29.6%
185	Niger	17.33%	-	-	17.51%	-	-	23.5%
186	Somalia	-	-	-	21.27%	-	-	22.8%

Methodology

This analysis uses UNESCO Institute for Statistics (UIS) data from household surveys and censuses across 188 countries (2000-2024). The data measures the percentage of adults aged 25 and older who have completed at least some primary education, based on self-reported educational attainment in nationally representative surveys.

The 2026 estimates are demographic-informed projections, not official forecasts or precise predictions. They represent likely direction and relative magnitude based on individual country assessment considering demographic factors. For each country, we analyzed historical patterns (computing annual change rates where multiple data points exist), demographic transition patterns, educational system development, economic development trajectory, and data reliability. Countries with clear trends and recent data use those observed patterns as a foundation, while countries with limited or older data are assessed using regional benchmarks and comparable country analysis. All projections account for the slow-changing nature of adult educational attainment (realistic annual change 0.2-0.8 percentage points) and demographic constraints based on population age structure. Values are rounded to reflect inherent uncertainty. All values represent estimated attainment shares for 2026, not direct survey measurements.

Rather than applying uniform formulas, each country receives individual demographic assessment. Our process: (1) Analyze historical attainment trends from available data points (e.g., if 2015: 60% and 2023: 65%, annual rate = +0.6%/year), (2) Evaluate whether this rate is sustainable given demographic structure and educational system capacity, (3) Examine education-specific developments relevant to primary attainment (education system expansion programs, school infrastructure investment, compulsory education law implementation, adult literacy initiatives, economic development enabling school attendance, demographic changes as younger educated cohorts age into 25+ group), (4) Compare with regional context and comparable countries to validate reasonableness, (5) Adjust for baseline value and demographic constraints (higher baselines = slower change due to ceiling effects), (6) Consider data recency and educational developments during the data gap. Countries showing unusual jumps are analyzed for survey methodology changes. For countries with older data, we assess educational system trajectory and demographic change rather than assuming stagnation. For countries with stable or declining patterns, we maintain current levels when demographically justified.

Most countries have recent data (2019+), representing current educational attainment levels with 157 countries having data from the last 7 years. For countries with older data, we assessed education-specific developments during the data gap: primary school construction and infrastructure expansion, teacher training programs and quality improvements, compulsory education law enforcement, economic development reducing child labor, adult literacy and second-chance education programs, and demographic transition as educated youth cohorts mature into the 25+ population. These contextual factors are used qualitatively to inform direction and magnitude, not as precise quantitative inputs. Sub-Saharan African countries show larger projected increases reflecting education expansion programs of the past two decades beginning to impact adult population composition. Conflict-affected countries (Afghanistan, Syria, Somalia) show minimal improvement due to educational system disruption. Post-Soviet countries maintain very high rates with minimal change due to already achieving near-universal primary education. High-income countries approach ceiling effects with rates above 95%, showing minimal projected change as demographic replacement occurs slowly.