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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $16,800 | 16,067 | 16,067 |
| 2006 | $27,100 | 25,746 | 25,746 |
| 2007 | $45,000 | 40,748 | 40,748 |
| 2008 | $88,000 | 67,597 | 67,597 |
| 2009 | $117,300 | 86,812 | 86,812 |
| 2010 | $160,400 | 136,131 | 136,131 |
| 2011 | $293,900 | 238,640 | 238,640 |
Note: Quantity represents Weight in kilograms
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