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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $171,235,614 | 340,550,546 | 340,550,546 |
| 2006 | $258,160,606 | 464,535,564 | 464,535,564 |
| 2007 | $322,963,952 | 547,983,015 | 547,983,015 |
| 2008 | $272,317,578 | 419,138,472 | 419,138,472 |
| 2009 | $179,932,834 | 130,239,300 | 130,239,300 |
| 2010 | $258,457,495 | 436,356,200 | 436,356,200 |
Note: Quantity represents Weight in kilograms
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