Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 35692 | Metric tons, zinc content of concentrate and direct shipping ore, unless otherwise specified | NA |
| 2003 | 36000 | Metric tons, zinc content of concentrate and direct shipping ore, unless otherwise specified | 0.86% |
| 2004 | 29011 | Metric tons, zinc content of concentrate and direct shipping ore, unless otherwise specified | -19.41% |
| 2005 | 15889 | Metric tons, zinc content of concentrate and direct shipping ore, unless otherwise specified | -45.23% |
