Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 11 | Metric tons | NA |
| 2003 | 11 | Metric tons | 0.00% |
| 2004 | 3100 | Metric tons | 28,081.82% |
| 2005 | 14 | Metric tons | -99.55% |
| 2006 | 13 | Metric tons | -7.14% |
| 2007 | 11 | Metric tons | -15.38% |
| 2008 | 10 | Metric tons | -9.09% |
| 2009 | 10 | Metric tons | 0.00% |
