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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $125,096,000 | 153,552,400 | 153,552,400 |
| 2006 | $270,440,000 | 280,953,600 | 280,953,600 |
| 2007 | $412,908,000 | 363,640,081 | 363,640,081 |
| 2008 | $403,695,000 | 311,388,657 | 311,388,657 |
| 2009 | $247,483,000 | 299,825,023 | 299,825,023 |
| 2010 | $338,565,597 | 308,256,219 | 308,256,219 |
| 2011 | $259,964,500 | 186,128,680 | 186,128,680 |
Note: Quantity represents Weight in kilograms
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