Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2006 | 1040 | Kilograms | NA |
| 2007 | 2420 | Kilograms | 132.69% |
| 2008 | 3390 | Kilograms | 40.08% |
| 2009 | 2422 | Kilograms | -28.55% |
| 2010 | 4656 | Kilograms | 92.24% |
| 2011 | 6000 | Kilograms | 28.87% |
| 2012 | 8075 | Kilograms | 34.58% |
| 2013 | 7530 | Kilograms | -6.75% |
