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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $261,296,042 | 8,336,351,040 | 8,336,351,040 |
| 2006 | $347,697,586 | 7,692,920,944 | 7,692,920,944 |
| 2007 | $541,122,966 | 9,635,265,960 | 9,635,265,960 |
| 2008 | $638,267,099 | 18,762,827,410 | 18,762,827,410 |
| 2009 | $919,170,947 | 11,716,439,016 | 11,716,439,016 |
| 2010 | $866,773,168 | 11,230,916,088 | 11,230,916,088 |
| 2011 | $1,742,992,199 | 16,591,155,528 | 16,591,155,528 |
Note: Quantity represents Weight in kilograms
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