Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2002 | 212.113998413086 | Thousand metric tons | NA |
2003 | 126.929000854492 | Thousand metric tons | -40.16% |
2004 | 300 | Thousand metric tons | 136.35% |
2005 | 3176.748046875 | Thousand metric tons | 958.92% |
2006 | 3439.5869140625 | Thousand metric tons | 8.27% |
2007 | 2943.962890625 | Thousand metric tons | -14.41% |
2008 | 1481.72998046875 | Thousand metric tons | -49.67% |
2009 | 1614.89001464844 | Thousand metric tons | 8.99% |
2010 | 1401 | Thousand metric tons | -13.24% |
2011 | 1891 | Thousand metric tons | 34.98% |
2012 | 1900 | Thousand metric tons | 0.48% |