Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2004 | 40 | Metric tons, lead content | NA |
| 2005 | 50 | Metric tons, lead content | 25.00% |
| 2006 | 17 | Metric tons, lead content | -66.00% |
| 2007 | 12 | Metric tons, lead content | -29.41% |
| 2008 | 449 | Metric tons, lead content | 3,641.67% |
| 2009 | 2064 | Metric tons, lead content | 359.69% |
| 2010 | 1168 | Metric tons, lead content | -43.41% |
| 2011 | 2577 | Metric tons, lead content | 120.63% |
| 2012 | 2500 | Metric tons, lead content | -2.99% |
