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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $362,022 | 15,011 | 47,609 |
| 2006 | $450,941 | 19,073 | 21,236 |
| 2007 | $538,152 | 21,326 | 25,666 |
| 2008 | $502,756 | 16,403 | 19,960 |
| 2009 | $396,800 | 15,314 | 25,972 |
| 2010 | $697,309 | 24,781 | 45,627 |
| 2011 | $826,959 | 28,352 | 52,641 |
Note: Quantity represents Number of pairs
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