Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 10 | Thousand metric tons of K | NA |
| 2004 | 10.1000003814697 | Thousand metric tons of K | 1.00% |
| 2005 | 13.1000003814697 | Thousand metric tons of K | 29.70% |
| 2006 | 8.10000038146973 | Thousand metric tons of K | -38.17% |
| 2007 | 11.8999996185303 | Thousand metric tons of K | 46.91% |
| 2008 | 11 | Thousand metric tons of K | -7.56% |
