Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 3563.93188476563 | Thousand metric tons of K | NA |
| 2004 | 3626.51000976563 | Thousand metric tons of K | 1.76% |
| 2005 | 3663.8291015625 | Thousand metric tons of K | 1.03% |
| 2006 | 3624.97705078125 | Thousand metric tons of K | -1.06% |
| 2007 | 3636.50390625 | Thousand metric tons of K | 0.32% |
| 2008 | 3280.46704101563 | Thousand metric tons of K | -9.79% |
| 2009 | 1825.13903808594 | Thousand metric tons of K | -44.36% |
| 2010 | 3023.94091796875 | Thousand metric tons of K | 65.68% |
| 2011 | 3214.69604492188 | Thousand metric tons of K | 6.31% |
| 2012 | 3120 | Thousand metric tons of K | -2.95% |
