Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2003 | 2400000 | Metric tons | NA |
2004 | 2200000 | Metric tons | -8.33 % |
2005 | 2300000 | Metric tons | 4.55 % |
2006 | 2400000 | Metric tons | 4.35 % |
2007 | 2000000 | Metric tons | -16.67 % |
2008 | 2200000 | Metric tons | 10.00 % |
2009 | 2300000 | Metric tons | 4.55 % |
2010 | 2000000 | Metric tons | -13.04 % |
2011 | 2100000 | Metric tons | 5.00 % |
2012 | 2200000 | Metric tons | 4.76 % |
2013 | 2200000 | Metric tons | 0.00 % |