Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2002 | 913 | Thousand metric tons | NA |
2003 | 891 | Thousand metric tons | -2.41 % |
2004 | 1044.94396972656 | Thousand metric tons | 17.28 % |
2005 | 1025.5400390625 | Thousand metric tons | -1.86 % |
2006 | 1226.31896972656 | Thousand metric tons | 19.58 % |
2007 | 1283.35705566406 | Thousand metric tons | 4.65 % |
2008 | 1406 | Thousand metric tons | 9.56 % |
2009 | 1074 | Thousand metric tons | -23.61 % |
2010 | 949 | Thousand metric tons | -11.64 % |
2011 | 893 | Thousand metric tons | -5.90 % |
2012 | 846 | Thousand metric tons | -5.26 % |