| Date | Population | Country | % Correct |
|---|---|---|---|
| 100 BC | 1427 m | China | 99%
|
| 500 | 1451 m | India | 99%
|
| 1880 | 349 m | United States | 99%
|
| 1949 | 212 m | Brazil | 97%
|
| 1825 | 145 m | Russia | 97%
|
| 1965 | 69.1 m | France | 96%
|
| 1893 | 84.5 m | Germany | 96%
|
| 1948 | 69.7 m | United Kingdom | 96%
|
| 1969 | 131 m | Mexico | 95%
|
| 1911 | 124 m | Japan | 93%
|
| 1916 | 283 m | Indonesia | 92%
|
| 1965 | 233 m | Nigeria | 91%
|
| 1985 | 117 m | Egypt | 90%
|
| 1963 | 251 m | Pakistan | 90%
|
| 1962 | 59.3 m | Italy | 89%
|
| 2006 | 64.0 m | South Africa | 89%
|
| 1985 | 91.6 m | Iran | 85%
|
| 1959 | 174 m | Bangladesh | 84%
|
| 2000 | 109 m | D.R. Congo | 83%
|
| 1984 | 87.5 m | Turkey | 83%
|
| 1985 | 71.7 m | Thailand | 81%
|
| 1978 | 100 m | Vietnam | 81%
|
| 2013 | 51.7 m | South Korea | 80%
|
| 1991 | 132 m | Ethiopia | 77%
|
| 2019 | 52.9 m | Colombia | 76%
|
| 1982 | 116 m | Philippines | 76%
|
| 2018 | 56.5 m | Kenya | 68%
|
| 2023 | 50.5 m | Sudan | 68%
|
| 2014 | 68.6 m | Tanzania | 62%
|
| 2012 | 54.5 m | Myanmar | 57%
|
| 2024 | 50.1 m | Uganda | 45%
|