Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2003 | 421000 | Metric tons | NA |
2004 | 488000 | Metric tons | 15.91% |
2005 | 472000 | Metric tons | -3.28% |
2006 | 487000 | Metric tons | 3.18% |
2007 | 514000 | Metric tons | 5.54% |
2008 | 510000 | Metric tons | -0.78% |