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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $75,398 | 2,847 | 4,789 |
| 2006 | $87,829 | 3,317 | 4,860 |
| 2007 | $307,099 | 10,524 | 24,392 |
| 2008 | $379,955 | 13,303 | 15,896 |
| 2009 | $597,550 | 18,725 | 30,141 |
| 2010 | $721,571 | 22,167 | 22,172 |
| 2011 | $345,584 | 10,307 | 10,634 |
Note: Quantity represents Number of pairs
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