Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2003 | 110000 | Metric tons | NA |
2004 | 120000 | Metric tons | 9.09 % |
2005 | 130000 | Metric tons | 8.33 % |
2006 | 120000 | Metric tons | -7.69 % |
2007 | 130000 | Metric tons | 8.33 % |
2008 | 140000 | Metric tons | 7.69 % |
2009 | 130000 | Metric tons | -7.14 % |
2010 | 140000 | Metric tons | 7.69 % |
2011 | 150000 | Metric tons | 7.14 % |
2012 | 160000 | Metric tons | 6.67 % |
2013 | 170000 | Metric tons | 6.25 % |