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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,196,851,028 | 3,274,358 | 3,274,358 |
| 2006 | $2,785,239,085 | 2,729,631 | 2,729,631 |
| 2007 | $4,317,670,864 | 2,898,867 | 2,898,867 |
| 2008 | $4,212,349,428 | 3,154,830 | 3,154,830 |
| 2009 | $3,761,403,936 | 2,732,558 | 2,732,558 |
| 2010 | $4,166,426,782 | 3,203,905 | 3,203,905 |
| 2011 | $3,672,311,070 | 2,978,111 | 2,978,111 |
Note: Quantity represents Weight in kilograms
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