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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,058,274,781 | 263,414,336 | 263,414,336 |
| 2006 | $2,784,096,798 | 191,599,086 | 191,599,086 |
| 2007 | $3,002,654,127 | 194,819,621 | 194,819,621 |
| 2008 | $2,632,785,580 | 117,612,538 | 117,612,538 |
| 2009 | $2,333,728,946 | 143,154,112 | 143,154,112 |
| 2010 | $3,063,861,887 | 231,584,125 | 231,584,125 |
| 2011 | $3,102,048,531 | 293,043,539 | 293,043,539 |
Note: Quantity represents Weight in kilograms
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