Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2009 | 1.40199995040894 | Thousand metric tons | NA |
2010 | 1.86099994182587 | Thousand metric tons | 32.74% |
2011 | 2.18300008773804 | Thousand metric tons | 17.30% |
2012 | 2.46099996566772 | Thousand metric tons | 12.73% |
2013 | 1 | Thousand metric tons | -59.37% |