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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $424,729,615 | 18,691,803 | 18,691,803 |
| 2006 | $411,166,982 | 22,761,340 | 22,761,340 |
| 2007 | $564,244,437 | 15,614,328 | 15,614,328 |
| 2008 | $568,489,363 | 17,241,460 | 17,241,460 |
| 2009 | $404,713,009 | 16,944,706 | 16,944,706 |
| 2010 | $459,659,517 | 18,415,918 | 18,415,918 |
| 2011 | $519,904,275 | 17,269,674 | 17,269,674 |
Note: Quantity represents Weight in kilograms
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