Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2003 | 1500 | Thousand metric tons | NA |
2004 | 1500 | Thousand metric tons | 0.00% |
2005 | 1500 | Thousand metric tons | 0.00% |
2006 | 1600 | Thousand metric tons | 6.67% |
2007 | 1600 | Thousand metric tons | 0.00% |
2008 | 2200 | Thousand metric tons | 37.50% |
2009 | 2500 | Thousand metric tons | 13.64% |
2010 | 2200 | Thousand metric tons | -12.00% |
2011 | 2200 | Thousand metric tons | 0.00% |
2012 | 2200 | Thousand metric tons | 0.00% |
2013 | 2100 | Thousand metric tons | -4.55% |