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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $31,455 | 5,918 | 5,918 |
| 2006 | $27,892 | 4,192 | 4,192 |
| 2007 | $22,794 | 3,529 | 3,529 |
| 2008 | $32,762 | 13,575 | 13,575 |
| 2009 | $23,238 | 13,677 | 13,677 |
| 2010 | $5,755 | 2,404 | 2,404 |
| 2011 | $1,336 | 189 | 189 |
Note: Quantity represents Weight in kilograms
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