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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $71,700,615 | 2,166,104,997 | 2,166,104,997 |
| 2006 | $320,037,123 | 9,252,437,135 | 9,252,437,135 |
| 2007 | $1,030,583,326 | 23,208,247,804 | 23,208,247,804 |
| 2008 | $1,638,749,992 | 25,737,473,700 | 25,737,473,700 |
| 2009 | $704,981,077 | 19,691,930,596 | 19,691,930,596 |
| 2010 | $1,309,966,840 | 29,953,301,467 | 29,953,301,467 |
| 2011 | $2,052,857,860 | 44,676,110,275 | 44,676,110,275 |
Note: Quantity represents Weight in kilograms
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