Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 1333 | Metric tons | NA |
| 2004 | 749 | Metric tons | -43.81% |
| 2005 | 893 | Metric tons | 19.23% |
| 2006 | 939 | Metric tons | 5.15% |
| 2007 | 2000 | Metric tons | 112.99% |
| 2008 | 2000 | Metric tons | 0.00% |
| 2009 | 1000 | Metric tons | -50.00% |
