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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,428,212,876 | 390,229,790 | 390,229,790 |
| 2006 | $2,236,113,919 | 337,517,145 | 337,517,145 |
| 2007 | $2,724,435,699 | 374,959,667 | 374,959,667 |
| 2008 | $2,708,278,713 | 369,324,156 | 369,324,156 |
| 2009 | $2,300,703,809 | 455,874,579 | 455,874,579 |
| 2010 | $2,806,932,943 | 379,433,926 | 379,433,926 |
| 2011 | $2,861,813,539 | 316,112,563 | 316,112,563 |
Note: Quantity represents Weight in kilograms
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