Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 3000 | Metric tons | NA |
| 2004 | 3000 | Metric tons | 0.00% |
| 2005 | 1878 | Metric tons | -37.40% |
| 2006 | 3138 | Metric tons | 67.09% |
| 2007 | 700 | Metric tons | -77.69% |
| 2008 | 700 | Metric tons | 0.00% |
| 2009 | 4121 | Metric tons | 488.71% |
| 2009 | 700 | Metric tons | -83.01% |
| 2010 | 4100 | Metric tons | 485.71% |
| 2011 | 4100 | Metric tons | 0.00% |
| 2012 | 4100 | Metric tons | 0.00% |
| 2013 | 4100 | Metric tons | 0.00% |
