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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $291,815 | 15,011 | 21,341 |
| 2006 | $104,185 | 5,359 | 10,279 |
| 2007 | $561,883 | 0 | 41,388 |
| 2008 | $487,154 | 24,193 | 36,755 |
| 2009 | $394,857 | 13,192 | 41,400 |
| 2010 | $705,732 | 27,446 | 78,389 |
| 2011 | $615,405 | 25,988 | 76,414 |
Note: Quantity represents Number of pairs
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