Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 13 | Metric tons | NA |
| 2004 | 12 | Metric tons | -7.69% |
| 2005 | 102 | Metric tons | 750.00% |
| 2006 | 22 | Metric tons | -78.43% |
| 2007 | 34 | Metric tons | 54.55% |
| 2008 | 136 | Metric tons | 300.00% |
| 2009 | 106.569000244141 | Metric tons | -21.64% |
| 2010 | 159.485000610352 | Metric tons | 49.65% |
| 2011 | 53.4690017700195 | Metric tons | -66.47% |
| 2012 | 16.5690002441406 | Metric tons | -69.01% |
| 2013 | 45 | Metric tons | 171.59% |
