Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 5465 | Thousand metric tons of K | NA |
| 2004 | 6405 | Thousand metric tons of K | 17.20 % |
| 2005 | 7131 | Thousand metric tons of K | 11.33 % |
| 2006 | 6610 | Thousand metric tons of K | -7.31 % |
| 2007 | 7275 | Thousand metric tons of K | 10.06 % |
| 2008 | 6730 | Thousand metric tons of K | -7.49 % |
