Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 1040 | Thousand metric tons of K | NA |
| 2004 | 547.200012207031 | Thousand metric tons of K | -47.38 % |
| 2005 | 439.200012207031 | Thousand metric tons of K | -19.74 % |
| 2006 | 420 | Thousand metric tons of K | -4.37 % |
| 2007 | 427 | Thousand metric tons of K | 1.67 % |
| 2008 | 427 | Thousand metric tons of K | 0.00 % |
