Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 13 | Metric tons | NA |
| 2004 | 12 | Metric tons | -7.69 % |
| 2005 | 102 | Metric tons | 750.00 % |
| 2006 | 22 | Metric tons | -78.43 % |
| 2007 | 34 | Metric tons | 54.55 % |
| 2008 | 136 | Metric tons | 300.00 % |
| 2009 | 140 | Metric tons | 2.94 % |
