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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,420,375,657 | 42,171,747 | 42,171,747 |
| 2006 | $1,992,230,209 | 61,958,520 | 61,958,520 |
| 2007 | $8,673,425,798 | 145,334,703 | 145,334,703 |
| 2008 | $11,042,556,752 | 179,291,374 | 179,291,374 |
| 2009 | $11,242,460,179 | 156,098,846 | 156,098,846 |
| 2010 | $16,017,594,955 | 226,085,635 | 226,085,635 |
| 2011 | $18,143,550,402 | 117,747,520 | 117,747,520 |
Note: Quantity represents Weight in kilograms
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