| # | % of World Production | Country | % Correct |
|---|---|---|---|
| 9 | 2.1 | United States | 96%
|
| 2 | 22.0 | Canada | 90%
|
| 8 | 2.7 | China | 90%
|
| 3 | 9.3 | Australia | 88%
|
| 5 | 5.0 | Russia | 88%
|
| 12 | 0.6 | India | 83%
|
| 1 | 39.3 | Kazakhstan | 75%
|
| 4 | 6.8 | Niger | 69%
|
| 11 | 0.6 | South Africa | 69%
|
| 7 | 3.9 | Uzbekistan | 69%
|
| 15 | 0.1 | Pakistan | 67%
|
| 10 | 2.0 | Ukraine | 65%
|
| 6 | 4.9 | Namibia | 46%
|
| 14 | 0.1 | Romania | 27%
|
| 13 | 0.3 | Czech Republic | 13%
|