Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2009 | 700000 | Metric tons | NA |
2010 | 750000 | Metric tons | 7.14% |
2011 | 760000 | Metric tons | 1.33% |
2012 | 770000 | Metric tons | 1.32% |
2013 | 780000 | Metric tons | 1.30% |