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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $280,981,515 | 6,377,584,690 | 6,377,584,690 |
| 2006 | $257,807,723 | 8,087,060,732 | 8,087,060,732 |
| 2007 | $493,618,613 | 10,787,444,522 | 10,787,444,522 |
| 2008 | $1,010,801,707 | 11,603,127,304 | 11,603,127,304 |
| 2009 | $467,059,568 | 11,244,906,661 | 11,244,906,661 |
| 2010 | $730,630,810 | 9,292,656,275 | 9,292,656,275 |
| 2011 | $1,547,278,649 | 14,127,454,277 | 14,127,454,277 |
Note: Quantity represents Weight in kilograms
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