Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2010 | 1 | Metric tons | NA |
| 2011 | 2 | Metric tons | 100.00% |
| 2012 | 2.40000009536743 | Metric tons | 20.00% |
