Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 942 | Metric tons | NA |
| 2004 | 1000 | Metric tons | 6.16% |
| 2005 | 100 | Metric tons | -90.00% |
| 2006 | 300 | Metric tons | 200.00% |
| 2007 | 400 | Metric tons | 33.33% |
| 2008 | 400 | Metric tons | 0.00% |
| 2009 | 2400 | Metric tons | 500.00% |
| 2011 | 17265 | Metric tons | 619.38% |
| 2013 | 5300 | Metric tons | -69.30% |
