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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $516,375,002 | 391,169,254 | 391,169,254 |
| 2006 | $1,158,988,710 | 492,426,003 | 492,426,003 |
| 2007 | $1,451,405,546 | 471,562,260 | 471,562,260 |
| 2008 | $788,019,988 | 217,218,683 | 217,218,683 |
| 2009 | $637,620,602 | 409,827,757 | 409,827,757 |
| 2010 | $708,258,487 | 317,281,017 | 317,281,017 |
| 2011 | $706,698,392 | 306,677,693 | 306,677,693 |
Note: Quantity represents Weight in kilograms
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