Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 300 | Metric tons | NA |
| 2004 | 300 | Metric tons | 0.00% |
| 2005 | 200 | Metric tons | -33.33% |
| 2006 | 250 | Metric tons | 25.00% |
| 2007 | 250 | Metric tons | 0.00% |
| 2008 | 250 | Metric tons | 0.00% |
| 2009 | 140 | Metric tons | -44.00% |
| 2010 | 98.6999969482422 | Metric tons | -29.50% |
| 2011 | 112.699996948242 | Metric tons | 14.18% |
| 2012 | 74.6999969482422 | Metric tons | -33.72% |
| 2013 | 100 | Metric tons | 33.87% |
