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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $119,457,017 | 531,602,275 | 531,602,275 |
| 2006 | $138,918,020 | 627,819,439 | 627,819,439 |
| 2007 | $142,183,409 | 648,350,750 | 648,350,750 |
| 2008 | $130,932,554 | 660,175,970 | 660,175,970 |
| 2009 | $111,639,294 | 451,676,774 | 451,676,774 |
| 2010 | $99,335,285 | 369,576,581 | 369,576,581 |
| 2011 | $92,367,748 | 358,638,675 | 358,638,675 |
Note: Quantity represents Weight in kilograms
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