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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $37,445 | 1,789 | 3,827 |
| 2006 | $28,450 | 2,421 | 3,150 |
| 2007 | $71,153 | 1,860 | 3,707 |
| 2008 | $122,710 | 4,542 | 7,561 |
| 2009 | $117,627 | 5,373 | 10,352 |
| 2010 | $111,060 | 3,767 | 6,046 |
| 2011 | $127,143 | 4,165 | 5,173 |
Note: Quantity represents Number of pairs
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