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| Year | Trade Value | Weight (kg) | Quantity |
| 2006 | $2,235,635 | 306,546 | 428,898 |
| 2007 | $2,103,192 | 183,331 | 252,509 |
| 2008 | $1,840,593 | 135,260 | 205,720 |
| 2009 | $3,139,308 | 110,677 | 234,873 |
| 2010 | $2,459,144 | 111,708 | 168,718 |
| 2011 | $3,872,814 | 121,536 | 178,697 |
Note: Quantity represents Number of pairs
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