Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 1100 | Thousand metric tons of K | NA |
| 2004 | 1200 | Thousand metric tons of K | 9.09% |
| 2005 | 1200 | Thousand metric tons of K | 0.00% |
| 2006 | 1100 | Thousand metric tons of K | -8.33% |
| 2007 | 1100 | Thousand metric tons of K | 0.00% |
| 2008 | 1100 | Thousand metric tons of K | 0.00% |
| 2009 | 720 | Thousand metric tons of K | -34.55% |
| 2010 | 930 | Thousand metric tons of K | 29.17% |
| 2011 | 1000 | Thousand metric tons of K | 7.53% |
| 2012 | 900 | Thousand metric tons of K | -10.00% |
