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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $423,266,870 | 2,456,768 | 2,456,768 |
| 2006 | $500,174,064 | 2,387,770 | 2,387,770 |
| 2007 | $465,139,682 | 2,117,833 | 2,117,833 |
| 2008 | $359,039,491 | 2,162,025 | 2,162,025 |
| 2009 | $233,154,725 | 1,382,709 | 1,382,709 |
| 2010 | $342,640,012 | 115,894,583 | 115,894,583 |
| 2011 | $305,732,386 | 1,964,795 | 1,964,795 |
Note: Quantity represents Weight in kilograms
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