| Milestone | Answer | % Correct |
|---|---|---|
| 20 million | China | 100%
|
| 40 million | China | 100%
|
| 60 million | China | 100%
|
| 80 million | China | 100%
|
| 100 million | China | 100%
|
| 125 million | China | 100%
|
| 150 million | China | 100%
|
| 200 million | China | 100%
|
| 300 million | China | 100%
|
| 400 million | China | 100%
|
| 40 million | India | 100%
|
| 60 million | India | 100%
|
| 80 million | India | 100%
|
| 100 million | India | 100%
|
| 125 million | India | 100%
|
| 150 million | India | 100%
|
| 200 million | India | 100%
|
| 300 million | India | 100%
|
| 400 million | India | 100%
|
| 40 million | United States | 93%
|
| 60 million | United States | 93%
|
| 80 million | United States | 93%
|
| 100 million | United States | 93%
|
| 125 million | United States | 93%
|
| 150 million | United States | 93%
|
| 200 million | United States | 93%
|
| 300 million | United States | 93%
|
| 400 million | United States | 93%
|
| 150 million | Brazil | 87%
|
| 200 million | Brazil | 87%
|
| 40 million | Russia | 87%
|
| 60 million | Russia | 87%
|
| 80 million | Russia | 87%
|
| 100 million | Russia | 87%
|
| 125 million | Russia | 87%
|
| 150 million | Russia | 87%
|
| 100 million | Indonesia | 80%
|
| 125 million | Indonesia | 80%
|
| 200 million | Indonesia | 80%
|
| 300 million | Indonesia | 80%
|
| 80 million | Japan | 80%
|
| 400 million | Pakistan | 80%
|
| 20 million | France | 73%
|
| 40 million | Germany | 73%
|
| 60 million | Germany | 73%
|
| 20 million | Italy | 67%
|
| 20 million | Turkey | 67%
|
| 300 million | Nigeria | 60%
|
| 400 million | Nigeria | 60%
|
| 20 million | Greece | 40%
|