Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2003 | 12700 | Thousand metric tons | NA |
2004 | 12800 | Thousand metric tons | 0.79 % |
2005 | 14400 | Thousand metric tons | 12.50 % |
2006 | 13800 | Thousand metric tons | -4.17 % |
2007 | 13800 | Thousand metric tons | 0.00 % |
2008 | 13800 | Thousand metric tons | 0.00 % |
2009 | 19759 | Thousand metric tons | 43.18 % |
2010 | 17656 | Thousand metric tons | -10.64 % |
2011 | 16369 | Thousand metric tons | -7.29 % |
2012 | 13946 | Thousand metric tons | -14.80 % |
2013 | 13870 | Thousand metric tons | -0.54 % |