Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 661 | Kilograms, contained selenium | NA |
| 2004 | 1000 | Kilograms, contained selenium | 51.29% |
| 2005 | 680000 | Kilograms, contained selenium | 67,900.00% |
| 2006 | 720000 | Kilograms, contained selenium | 5.88% |
| 2007 | 700000 | Kilograms, contained selenium | -2.78% |
| 2008 | 690000 | Kilograms, contained selenium | -1.43% |
| 2009 | 700000 | Kilograms, contained selenium | 1.45% |
