Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2002 | 31009 | Thousand metric tons | NA |
2003 | 32749 | Thousand metric tons | 5.61% |
2004 | 31854 | Thousand metric tons | -2.73% |
2005 | 31009 | Thousand metric tons | -2.65% |
2006 | 33630 | Thousand metric tons | 8.45% |
2007 | 33382 | Thousand metric tons | -0.74% |
2008 | 32461 | Thousand metric tons | -2.76% |
2009 | 29974 | Thousand metric tons | -7.66% |
2010 | 29203 | Thousand metric tons | -2.57% |
2011 | 32779 | Thousand metric tons | 12.25% |
2012 | 32432 | Thousand metric tons | -1.06% |