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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $356,298,740 | 2,626,075,016 | 2,626,075,016 |
| 2006 | $348,818,850 | 2,445,125,024 | 2,445,125,024 |
| 2007 | $444,614,252 | 2,496,541,016 | 2,496,541,016 |
| 2008 | $503,706,828 | 2,449,693,008 | 2,449,693,008 |
| 2009 | $279,256,404 | 1,406,342,992 | 1,406,342,992 |
| 2010 | $386,447,743 | 2,016,619,000 | 2,016,619,000 |
| 2011 | $415,823,857 | 1,891,367,024 | 1,891,367,024 |
Note: Quantity represents Weight in kilograms
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