Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2002 | 121000 | Metric tons | NA |
2003 | 130000 | Metric tons | 7.44% |
2004 | 140000 | Metric tons | 7.69% |
2005 | 150000 | Metric tons | 7.14% |
2006 | 208000 | Metric tons | 38.67% |
2007 | 241000 | Metric tons | 15.87% |
2008 | 241000 | Metric tons | 0.00% |
2009 | 256000 | Metric tons | 6.22% |
2010 | 249000 | Metric tons | -2.73% |
2011 | 249000 | Metric tons | 0.00% |
2012 | 233000 | Metric tons | -6.43% |