Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2003 | 468000 | Metric tons | NA |
2004 | 532000 | Metric tons | 13.68% |
2005 | 489000 | Metric tons | -8.08% |
2006 | 589000 | Metric tons | 20.45% |
2007 | 455000 | Metric tons | -22.75% |
2008 | 648000 | Metric tons | 42.42% |
2009 | 396000 | Metric tons | -38.89% |
2010 | 662000 | Metric tons | 67.17% |
2011 | 710000 | Metric tons | 7.25% |
2012 | 666000 | Metric tons | -6.20% |