| Date | Population | Country | % Correct |
|---|---|---|---|
| 1420 | 1,379 mil | China | 100%
|
| 1450 | 1,331 mil | India | 100%
|
| 1930 | 147 mil | Russia | 98%
|
| 1915 | 325 mil | United States | 98%
|
| 1972 | 207 mil | Brazil | 94%
|
| 1963 | 261 mil | Indonesia | 94%
|
| 1991 | 187 mil | Nigeria | 92%
|
| 2000 | 129 mil | Mexico | 90%
|
| 1987 | 195 mil | Pakistan | 90%
|
| 1988 | 161 mil | Bangladesh | 82%
|
| 1967 | 127 mil | Japan | 82%
|
| 2014 | 103 mil | Philippines | 67%
|
| 2016 | 102 mil | Ethiopia | 65%
|