Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2002 | 744 | Thousand metric tons | NA |
2003 | 766 | Thousand metric tons | 2.96% |
2004 | 768.400024414063 | Thousand metric tons | 0.31% |
2005 | 686.400024414063 | Thousand metric tons | -10.67% |
2006 | 883 | Thousand metric tons | 28.64% |
2007 | 890 | Thousand metric tons | 0.79% |
2008 | 958 | Thousand metric tons | 7.64% |
2009 | 870 | Thousand metric tons | -9.19% |
2010 | 791 | Thousand metric tons | -9.08% |
2011 | 827 | Thousand metric tons | 4.55% |
2012 | 654 | Thousand metric tons | -20.92% |