Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2009 | 1600 | Metric tons | NA |
| 2010 | 500 | Metric tons | -68.75% |
| 2011 | 550 | Metric tons | 10.00% |
| 2012 | 500 | Metric tons | -9.09% |
| 2013 | 500 | Metric tons | 0.00% |
