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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $386,510 | 23,344 | 28,881 |
| 2006 | $306,204 | 20,766 | 22,880 |
| 2007 | $286,323 | 17,747 | 11,251 |
| 2008 | $478,847 | 49,971 | 0 |
| 2009 | $457,456 | 27,502 | 15,230 |
| 2010 | $259,042 | 19,960 | 8,998 |
| 2011 | $378,702 | 29,929 | 13,197 |
Note: Quantity represents Number of pairs
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