Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 50 | Metric tons | NA |
| 2004 | 50 | Metric tons | 0.00% |
| 2005 | 50 | Metric tons | 0.00% |
| 2006 | 60 | Metric tons | 20.00% |
| 2007 | 70 | Metric tons | 16.67% |
| 2008 | 70 | Metric tons | 0.00% |
| 2009 | 65 | Metric tons | -7.14% |
| 2010 | 70 | Metric tons | 7.69% |
| 2011 | 75 | Metric tons | 7.14% |
| 2012 | 75 | Metric tons | 0.00% |
| 2013 | 80 | Metric tons | 6.67% |
