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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,560,460 | 346,313 | 834,734 |
| 2006 | $4,899,069 | 246,454 | 651,540 |
| 2007 | $6,037,259 | 312,389 | 1,105,437 |
| 2008 | $6,320,729 | 228,533 | 539,060 |
| 2009 | $5,511,352 | 202,403 | 369,160 |
| 2010 | $5,598,527 | 218,740 | 412,398 |
Note: Quantity represents Number of pairs
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