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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $885,780,617 | 3,407,683,382 | 3,407,683,382 |
| 2006 | $902,348,495 | 3,057,315,266 | 3,057,315,266 |
| 2007 | $1,189,886,029 | 3,690,986,460 | 3,690,986,460 |
| 2008 | $1,774,914,041 | 2,458,024,407 | 2,458,024,407 |
| 2009 | $336,441,821 | 1,627,468,524 | 1,627,468,524 |
| 2010 | $1,376,473,291 | 3,955,094,892 | 3,955,094,892 |
Note: Quantity represents Weight in kilograms
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