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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $649,830 | 78,822 | 288,711 |
| 2006 | $219,059 | 26,571 | 114,056 |
| 2007 | $788,183 | 0 | 321,606 |
| 2008 | $365,555 | 41,056 | 127,369 |
| 2009 | $531,675 | 53,356 | 307,623 |
| 2010 | $331,007 | 33,702 | 118,111 |
| 2011 | $197,449 | 18,286 | 69,341 |
Note: Quantity represents Number of pairs
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