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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $474,165,709 | 1,852,701,682 | 1,852,701,682 |
| 2006 | $493,327,369 | 2,116,057,558 | 2,116,057,558 |
| 2007 | $702,129,541 | 2,323,096,407 | 2,323,096,407 |
| 2008 | $1,040,658,919 | 2,273,291,649 | 2,273,291,649 |
| 2009 | $1,019,553,288 | 2,324,279,677 | 2,324,279,677 |
| 2010 | $1,162,000,754 | 2,868,875,287 | 2,868,875,287 |
| 2011 | $1,321,037,723 | 2,938,555,836 | 2,938,555,836 |
Note: Quantity represents Weight in kilograms
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