Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2003 | 1882 | Thousand metric tons | NA |
2004 | 1900 | Thousand metric tons | 0.96% |
2005 | 1920 | Thousand metric tons | 1.05% |
2006 | 1892 | Thousand metric tons | -1.46% |
2007 | 1900 | Thousand metric tons | 0.42% |