| Production (tonnes) | Country | Continent | % Correct |
|---|---|---|---|
| 220 | Canada | North America | 99%
|
| 170 | United States | North America | 99%
|
| 330 | China | Asia | 98%
|
| 320 | Australia | Oceania | 96%
|
| 120 | Mexico | North America | 96%
|
| 110 | South Africa | Africa | 95%
|
| 320 | Russia | Asia | 90%
|
| 100 | Peru | South America | 88%
|
| 120 | Kazakhstan | Asia | 79%
|
| 100 | Uzbekistan | Asia | 58%
|