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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $193,954,145 | 574,040,731 | 574,040,731 |
| 2006 | $162,890,360 | 572,893,373 | 572,893,373 |
| 2007 | $426,875,575 | 1,136,186,258 | 1,136,186,258 |
| 2008 | $517,279,550 | 418,954,387 | 418,954,387 |
| 2009 | $660,341,395 | 548,680,364 | 548,680,364 |
| 2010 | $694,718,365 | 496,094,778 | 496,094,778 |
| 2011 | $915,693,821 | 1,899,954,279 | 1,899,954,279 |
Note: Quantity represents Weight in kilograms
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