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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $143,999 | 34,204 | 322,768 |
| 2006 | $201,650 | 35,259 | 434,928 |
| 2007 | $129,180 | 22,152 | 134,581 |
| 2008 | $409,080 | 70,798 | 365,757 |
| 2009 | $391,973 | 54,331 | 244,256 |
| 2010 | $519,810 | 62,416 | 409,216 |
| 2011 | $591,023 | 94,153 | 300,645 |
Note: Quantity represents Number of pairs
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