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 | 1600 | Thousand metric tons | 6.67% |
2006 | 1500 | Thousand metric tons | -6.25% |
2007 | 1500 | Thousand metric tons | 0.00% |
2008 | 1500 | Thousand metric tons | 0.00% |
2009 | 1022 | Thousand metric tons | -31.87% |
2010 | 1055 | Thousand metric tons | 3.23% |
2011 | 1162 | Thousand metric tons | 10.14% |
2012 | 1083 | Thousand metric tons | -6.80% |
2013 | 1000 | Thousand metric tons | -7.66% |