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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $298,947 | 52,271 | 274,807 |
| 2006 | $291,029 | 50,887 | 284,793 |
| 2007 | $325,052 | 49,399 | 272,403 |
| 2008 | $354,973 | 61,434 | 305,028 |
| 2009 | $406,948 | 56,407 | 388,645 |
| 2010 | $381,270 | 45,781 | 353,041 |
Note: Quantity represents Number of pairs
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