Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 45000 | Kilograms, contained selenium | NA |
| 2004 | 48000 | Kilograms, contained selenium | 6.67% |
| 2005 | 68000 | Kilograms, contained selenium | 41.67% |
| 2006 | 65000 | Kilograms, contained selenium | -4.41% |
| 2007 | 65000 | Kilograms, contained selenium | 0.00% |
| 2008 | 65000 | Kilograms, contained selenium | 0.00% |
| 2009 | 65000 | Kilograms, contained selenium | 0.00% |
