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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $145,991,531 | 1,898,781,052 | 1,898,781,052 |
| 2006 | $104,701,592 | 1,193,916,260 | 1,193,916,260 |
| 2007 | $78,064,673 | 870,118,950 | 870,118,950 |
| 2008 | $155,846,491 | 942,708,000 | 942,708,000 |
| 2009 | $51,291,542 | 586,742,001 | 586,742,001 |
| 2010 | $125,829,231 | 941,612,400 | 941,612,400 |
| 2011 | $338,570,366 | 1,962,561,523 | 1,962,561,523 |
Note: Quantity represents Weight in kilograms
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