Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2005 | 53 | Kilograms | NA |
| 2006 | 71 | Kilograms | 33.96% |
| 2007 | 212 | Kilograms | 198.59% |
| 2008 | 196 | Kilograms | -7.55% |
| 2009 | 157 | Kilograms | -19.90% |
| 2010 | 270 | Kilograms | 71.97% |
| 2011 | 164 | Kilograms | -39.26% |
| 2012 | 135 | Kilograms | -17.68% |
