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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $353,119,000 | 420,000 | 420,000 |
| 2006 | $397,138,000 | 393,400 | 393,400 |
| 2007 | $704,087,000 | 570,111 | 570,111 |
| 2008 | $708,010,000 | 394,800 | 394,800 |
| 2009 | $724,743,000 | 586,400 | 586,400 |
| 2010 | $441,832,092 | 352,600 | 352,600 |
| 2011 | $228,009,716 | 124,126 | 124,126 |
Note: Quantity represents Weight in kilograms
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