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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $433,884,562 | 22,758,828 | 22,758,828 |
| 2006 | $443,624,726 | 23,602,843 | 23,602,843 |
| 2007 | $472,680,713 | 23,788,470 | 23,788,470 |
| 2008 | $442,052,819 | 24,339,000 | 24,339,000 |
| 2009 | $513,527,755 | 28,101,000 | 28,101,000 |
| 2010 | $668,816,303 | 33,213,000 | 33,213,000 |
Note: Quantity represents Weight in kilograms
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