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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $103,343,827 | 613,129,800 | 613,129,800 |
| 2006 | $78,400,887 | 400,704,613 | 400,704,613 |
| 2007 | $105,002,718 | 465,942,347 | 465,942,347 |
| 2008 | $190,343,332 | 417,306,543 | 417,306,543 |
| 2009 | $95,790,433 | 403,675,980 | 403,675,980 |
| 2010 | $122,563,739 | 479,326,395 | 479,326,395 |
| 2011 | $182,110,185 | 480,804,115 | 480,804,115 |
Note: Quantity represents Weight in kilograms
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