| year | % global output | Answer | % Correct |
|---|---|---|---|
| circa 1870 | 21 | British Empire | 94%
|
| circa 100 AD | 25 - 30 | Roman Empire | 92%
|
| circa 1950 | 50 | United States | 89%
|
| circa 1200 AD | 25 -30 | Song Dynasty (China) | 70%
|
| circa 1700 AD | 25 | Mughal Empire | 54%
|