Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2003 | 79000 | Metric tons | NA |
2004 | 115000 | Metric tons | 45.57% |
2005 | 95000 | Metric tons | -17.39% |
2006 | 95000 | Metric tons | 0.00% |
2007 | 95000 | Metric tons | 0.00% |
2008 | 170000 | Metric tons | 78.95% |
2009 | 170000 | Metric tons | 0.00% |
2010 | 200000 | Metric tons | 17.65% |
2011 | 200000 | Metric tons | 0.00% |
2012 | 250000 | Metric tons | 25.00% |