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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,415,599,000 | 1,180,243,400 | 1,180,243,400 |
| 2006 | $3,785,448,000 | 1,419,887,475 | 1,419,887,475 |
| 2007 | $4,311,033,000 | 1,444,291,480 | 1,444,291,480 |
| 2008 | $4,181,303,000 | 1,370,182,522 | 1,370,182,522 |
| 2009 | $2,404,204,000 | 1,157,196,963 | 1,157,196,963 |
| 2010 | $3,764,513,086 | 1,591,916,500 | 1,591,916,500 |
| 2011 | $4,974,978,206 | 1,790,877,670 | 1,790,877,670 |
Note: Quantity represents Weight in kilograms
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