Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 2100 | Metric tons | NA |
| 2004 | 7500 | Metric tons | 257.14% |
| 2005 | 672 | Metric tons | -91.04% |
| 2006 | 1000 | Metric tons | 48.81% |
| 2007 | 2000 | Metric tons | 100.00% |
| 2008 | 2000 | Metric tons | 0.00% |
| 2009 | 15396 | Metric tons | 669.80% |
| 2011 | 40000 | Metric tons | 159.81% |
| 2012 | 20000 | Metric tons | -50.00% |
