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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,432,444,330 | 1,043,909,821 | 1,043,909,821 |
| 2006 | $1,790,502,508 | 1,197,240,329 | 1,197,240,329 |
| 2007 | $2,065,995,436 | 1,229,636,723 | 1,229,636,723 |
| 2008 | $2,276,207,229 | 1,158,608,001 | 1,158,608,001 |
| 2009 | $1,866,875,812 | 1,096,558,463 | 1,096,558,463 |
| 2010 | $2,132,234,343 | 1,134,560,845 | 1,134,560,845 |
| 2011 | $2,366,932,277 | 1,149,423,709 | 1,149,423,709 |
Note: Quantity represents Weight in kilograms
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