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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $271,757,201 | 31,542,253 | 31,542,253 |
| 2006 | $325,290,541 | 37,755,748 | 37,755,748 |
| 2007 | $317,157,906 | 44,161,351 | 44,161,351 |
| 2008 | $390,659,676 | 56,369,241 | 56,369,241 |
| 2009 | $363,914,650 | 52,274,246 | 52,274,246 |
| 2010 | $487,607,119 | 68,980,466 | 68,980,466 |
| 2011 | $576,077,470 | 71,477,508 | 71,477,508 |
Note: Quantity represents Weight in kilograms
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