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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $274,790 | 13,677 | 10,657 |
| 2006 | $220,884 | 7,301 | 8,566 |
| 2007 | $234,860 | 8,584 | 8,522 |
| 2008 | $254,963 | 4,822 | 8,492 |
| 2009 | $305,771 | 8,804 | 8,911 |
| 2010 | $240,586 | 9,221 | 7,392 |
| 2011 | $294,852 | 7,813 | 9,073 |
Note: Quantity represents Number of pairs
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