Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 227 | Metric tons | NA |
| 2004 | 548 | Metric tons | 141.41% |
| 2005 | 59 | Metric tons | -89.23% |
| 2006 | 600 | Metric tons | 916.95% |
| 2007 | 500 | Metric tons | -16.67% |
| 2008 | 1000 | Metric tons | 100.00% |
| 2009 | 323 | Metric tons | -67.70% |
| 2010 | 440 | Metric tons | 36.22% |
| 2011 | 591 | Metric tons | 34.32% |
| 2012 | 745 | Metric tons | 26.06% |
| 2013 | 525 | Metric tons | -29.53% |
