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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $51,530 | 41,824 | 85,711 |
| 2006 | $94,280 | 50,486 | 178,529 |
| 2007 | $290,351 | 258,765 | 172,180 |
| 2008 | $1,674,560 | 168,148 | 194,685 |
| 2009 | $270,219 | 141,992 | 70,855 |
| 2010 | $153,032 | 56,763 | 123,251 |
| 2011 | $91,626 | 50,864 | 21,763 |
Note: Quantity represents Number of pairs
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