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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $543,766,274 | 643,942,072 | 643,942,072 |
| 2006 | $546,165,657 | 545,790,186 | 545,790,186 |
| 2007 | $525,964,451 | 466,490,819 | 466,490,819 |
| 2008 | $467,163,080 | 367,464,770 | 367,464,770 |
| 2009 | $243,353,777 | 179,338,709 | 179,338,709 |
| 2010 | $622,353,053 | 546,633,060 | 546,633,060 |
Note: Quantity represents Weight in kilograms
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