Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2002 | 1561 | Thousand metric tons | NA |
2003 | 1541 | Thousand metric tons | -1.28% |
2004 | 1546.30004882813 | Thousand metric tons | 0.34% |
2005 | 1550 | Thousand metric tons | 0.24% |
2006 | 1470 | Thousand metric tons | -5.16% |
2007 | 1728 | Thousand metric tons | 17.55% |
2008 | 2111 | Thousand metric tons | 22.16% |
2009 | 2118 | Thousand metric tons | 0.33% |
2010 | 1864 | Thousand metric tons | -11.99% |
2011 | 951 | Thousand metric tons | -48.98% |
2012 | 2000 | Thousand metric tons | 110.31% |