Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 58 | Metric tons | NA |
| 2004 | 247 | Metric tons | 325.86 % |
| 2005 | 39 | Metric tons | -84.21 % |
| 2006 | 68 | Metric tons | 74.36 % |
| 2007 | 52 | Metric tons | -23.53 % |
| 2008 | 73 | Metric tons | 40.38 % |
| 2009 | 48 | Metric tons | -34.25 % |
| 2010 | 34 | Metric tons | -29.17 % |
