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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,232,242,506 | 1,559,809 | 1,559,809 |
| 2006 | $2,027,013,518 | 2,296,749 | 2,296,749 |
| 2007 | $4,237,533,663 | 3,525,023 | 3,525,023 |
| 2008 | $340,313,553 | 483,374 | 483,374 |
| 2009 | $141,535,002 | 0 | 0 |
| 2010 | $100,818,098 | 333,790 | 333,790 |
Note: Quantity represents Weight in kilograms
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