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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $25,335,268 | 6,251,487,007 | 6,251,487,007 |
| 2006 | $26,463,719 | 6,891,892,430 | 6,891,892,430 |
| 2007 | $29,874,405 | 3,236,218,599 | 3,236,218,599 |
| 2008 | $50,360,521 | 5,375,468,584 | 5,375,468,584 |
| 2009 | $17,966,865 | 2,033,398,468 | 2,033,398,468 |
| 2010 | $16,011,367 | 2,172,079,795 | 2,172,079,795 |
| 2011 | $25,247,673 | 3,316,813,681 | 3,316,813,681 |
Note: Quantity represents Weight in kilograms
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