Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 1300 | Metric tons | NA |
| 2003 | 2000 | Metric tons | 53.85% |
| 2004 | 2500 | Metric tons | 25.00% |
| 2005 | 3000 | Metric tons | 20.00% |
| 2006 | 3000 | Metric tons | 0.00% |
| 2007 | 2500 | Metric tons | -16.67% |
| 2008 | 1500 | Metric tons | -40.00% |
| 2009 | 127 | Metric tons | -91.53% |
| 2010 | 144 | Metric tons | 13.39% |
| 2011 | 75 | Metric tons | -47.92% |
| 2012 | 100 | Metric tons | 33.33% |
| 2013 | 420 | Metric tons | 320.00% |
