Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2004 | 537 | Metric tons | NA |
| 2005 | 31000 | Metric tons | 5,672.81% |
| 2006 | 30000 | Metric tons | -3.23% |
| 2007 | 30000 | Metric tons | 0.00% |
