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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,988,605,407 | 39,265,699 | 39,265,699 |
| 2006 | $2,845,415,916 | 32,572,780 | 32,572,780 |
| 2007 | $1,961,125,022 | 0 | 0 |
| 2008 | $1,104,880,703 | 0 | 0 |
| 2009 | $773,212,375 | 0 | 0 |
| 2010 | $826,971,693 | 0 | 0 |
| 2011 | $798,838,406 | 0 | 0 |
Note: Quantity represents Weight in kilograms
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