Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2003 | 11248 | Thousand metric tons | NA |
2004 | 1047.80004882813 | Thousand metric tons | -90.68 % |
2005 | 1412 | Thousand metric tons | 34.76 % |
2006 | 1713.59997558594 | Thousand metric tons | 21.36 % |
2007 | 1439 | Thousand metric tons | -16.02 % |
2008 | 918.5 | Thousand metric tons | -36.17 % |
2009 | 860 | Thousand metric tons | -6.37 % |
2010 | 965 | Thousand metric tons | 12.21 % |
2011 | 927 | Thousand metric tons | -3.94 % |
2012 | 927 | Thousand metric tons | 0.00 % |
2013 | 927 | Thousand metric tons | 0.00 % |