Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 3 | Metric tons | NA |
| 2003 | 182 | Metric tons | 5,966.67% |
| 2004 | 576 | Metric tons | 216.48% |
| 2005 | 35 | Metric tons | -93.92% |
| 2006 | 218 | Metric tons | 522.86% |
| 2007 | 606 | Metric tons | 177.98% |
| 2008 | 731 | Metric tons | 20.63% |
| 2009 | 882 | Metric tons | 20.66% |
| 2010 | 2063 | Metric tons | 133.90% |
| 2011 | 4176 | Metric tons | 102.42% |
| 2012 | 9449 | Metric tons | 126.27% |
