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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,220,549 | 206,401 | 396,051 |
| 2006 | $6,499,621 | 212,943 | 366,863 |
| 2007 | $5,963,114 | 211,553 | 364,568 |
| 2008 | $7,872,860 | 223,456 | 354,526 |
| 2009 | $6,806,518 | 173,550 | 329,797 |
| 2010 | $10,393,099 | 253,855 | 478,819 |
| 2011 | $9,870,433 | 270,084 | 460,931 |
Note: Quantity represents Number of pairs
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