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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $968,726,524 | 11,731,501,151 | 11,731,501,151 |
| 2006 | $1,129,761,468 | 13,852,818,459 | 13,852,818,459 |
| 2007 | $1,337,011,488 | 14,587,916,207 | 14,587,916,207 |
| 2008 | $1,369,409,960 | 7,822,075,616 | 7,822,075,616 |
| 2009 | $703,967,437 | 4,573,411,580 | 4,573,411,580 |
| 2010 | $983,743,077 | 6,786,278,299 | 6,786,278,299 |
Note: Quantity represents Weight in kilograms
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