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| Year | Trade Value | Weight (kg) | Quantity |
| 2006 | $276,054,885 | 2,256,841,516 | 2,256,841,516 |
| 2007 | $464,884,635 | 5,935,959,452 | 5,935,959,452 |
| 2008 | $395,595,213 | 4,847,980,553 | 4,847,980,553 |
| 2009 | $293,874,364 | 1,400,105,110 | 1,400,105,110 |
| 2010 | $451,228,341 | 2,412,762,246 | 2,412,762,246 |
Note: Quantity represents Weight in kilograms
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