Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 4230 | Thousand metric tons of K | NA |
| 2004 | 4600 | Thousand metric tons of K | 8.75% |
| 2005 | 4844 | Thousand metric tons of K | 5.30% |
| 2006 | 4605 | Thousand metric tons of K | -4.93% |
| 2007 | 4972 | Thousand metric tons of K | 7.97% |
| 2008 | 4967.5 | Thousand metric tons of K | -0.09% |
| 2009 | 2485 | Thousand metric tons of K | -49.97% |
| 2010 | 5223 | Thousand metric tons of K | 110.18% |
| 2011 | 7304 | Thousand metric tons of K | 39.84% |
| 2012 | 4906 | Thousand metric tons of K | -32.83% |
