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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $770,624 | 149,929 | 123,231 |
| 2006 | $1,780,447 | 225,861 | 284,712 |
| 2007 | $1,088,083 | 177,507 | 147,253 |
| 2008 | $977,909 | 172,812 | 119,944 |
| 2009 | $1,069,738 | 189,731 | 124,410 |
| 2010 | $1,591,241 | 287,708 | 169,299 |
Note: Quantity represents Number of pairs
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