Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2002 | 347 | Thousand metric tons | NA |
2003 | 345 | Thousand metric tons | -0.58 % |
2004 | 424.600006103516 | Thousand metric tons | 23.07 % |
2005 | 450 | Thousand metric tons | 5.98 % |
2006 | 450 | Thousand metric tons | 0.00 % |
2007 | 450 | Thousand metric tons | 0.00 % |
2008 | 450 | Thousand metric tons | 0.00 % |
2009 | 870 | Thousand metric tons | 93.33 % |
2010 | 857 | Thousand metric tons | -1.49 % |
2011 | 860 | Thousand metric tons | 0.35 % |
2012 | 860 | Thousand metric tons | 0.00 % |