Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2005 | 741 | Kilograms | NA |
| 2006 | 5036 | Kilograms | 579.62% |
| 2007 | 7068 | Kilograms | 40.35% |
| 2008 | 7837 | Kilograms | 10.88% |
| 2009 | 8897 | Kilograms | 13.53% |
| 2010 | 9213 | Kilograms | 3.55% |
| 2011 | 11898 | Kilograms | 29.14% |
| 2012 | 6473 | Kilograms | -45.60% |
