Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 81000 | Kilograms, contained selenium | NA |
| 2004 | 85000 | Kilograms, contained selenium | 4.94% |
| 2005 | 100000 | Kilograms, contained selenium | 17.65% |
| 2006 | 110000 | Kilograms, contained selenium | 10.00% |
| 2007 | 120000 | Kilograms, contained selenium | 9.09% |
| 2008 | 130000 | Kilograms, contained selenium | 8.33% |
| 2009 | 140000 | Kilograms, contained selenium | 7.69% |
