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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,007,900 | 254,525 | 552,884 |
| 2006 | $6,173,861 | 224,233 | 356,867 |
| 2007 | $4,187,255 | 133,418 | 223,043 |
| 2008 | $3,325,162 | 83,490 | 240,176 |
| 2009 | $3,555,482 | 75,205 | 270,069 |
| 2010 | $5,147,321 | 110,736 | 281,770 |
| 2011 | $4,627,577 | 107,710 | 239,744 |
Note: Quantity represents Number of pairs
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