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Country | Production 2007 | Production 2004 | |
---|---|---|---|
1 | United States of America | 1,580,000 m/t | 1,952,260 m/t |
2 | China | 540,546 m/t | 423,000 m/t |
3 | South Africa | 386,494 m/t | 288,372 m/t |
4 | Mexico | 313,497 m/t | 408,953 m/t |
5 | Syrian Arab Republic | 290,000 m/t | N/A |