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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $285,196,866 | 638,528,188 | 638,528,188 |
| 2006 | $453,193,298 | 834,005,755 | 834,005,755 |
| 2007 | $482,447,244 | 807,636,391 | 807,636,391 |
| 2008 | $100,764,391 | 127,027,652 | 127,027,652 |
| 2009 | $34,606,806 | 40,203,681 | 40,203,681 |
| 2010 | $527,673,265 | 736,971,772 | 736,971,772 |
Note: Quantity represents Weight in kilograms
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