Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 600 | Metric tons, tungsten content | NA |
| 2004 | 600 | Metric tons, tungsten content | 0.00 % |
| 2005 | 650 | Metric tons, tungsten content | 8.33 % |
| 2006 | 930 | Metric tons, tungsten content | 43.08 % |
| 2007 | 230 | Metric tons, tungsten content | -75.27 % |
| 2008 | 270 | Metric tons, tungsten content | 17.39 % |
| 2009 | 100 | Metric tons, tungsten content | -62.96 % |
