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| Year | Trade Value | Weight (kg) | Quantity |
| 2007 | $708,934,931 | 4,366,515,099 | 4,366,515,099 |
| 2008 | $1,209,497,965 | 4,780,577,910 | 4,780,577,910 |
| 2009 | $763,314,419 | 1,709,191,348 | 1,709,191,348 |
| 2010 | $806,934,853 | 2,003,371,348 | 2,003,371,348 |
| 2011 | $1,063,075,735 | 2,551,043,715 | 2,551,043,715 |
Note: Quantity represents Weight in kilograms
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