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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $58,148,000 | 54,842,400 | 54,842,400 |
| 2006 | $68,973,000 | 73,190,900 | 73,190,900 |
| 2007 | $68,419,000 | 64,324,300 | 64,324,300 |
| 2008 | $106,645,000 | 435,269,652 | 435,269,652 |
| 2009 | $120,011,000 | 770,776,023 | 770,776,023 |
| 2010 | $97,026,162 | 605,054,400 | 605,054,400 |
| 2011 | $91,468,986 | 557,480,156 | 557,480,156 |
Note: Quantity represents Weight in kilograms
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