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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $308,008,850 | 1,086,178,239 | 1,086,178,239 |
| 2006 | $299,578,194 | 1,132,143,509 | 1,132,143,509 |
| 2007 | $479,428,416 | 1,411,588,709 | 1,411,588,709 |
| 2008 | $697,985,415 | 1,173,097,366 | 1,173,097,366 |
| 2009 | $621,281,209 | 1,314,619,698 | 1,314,619,698 |
| 2010 | $840,037,048 | 1,740,504,690 | 1,740,504,690 |
| 2011 | $1,245,962,887 | 2,088,615,511 | 2,088,615,511 |
Note: Quantity represents Weight in kilograms
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