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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,909 | 1,713 | 375 |
| 2006 | $196,003 | 193,177 | 25,249 |
| 2007 | $58,477 | 74,936 | 7,336 |
| 2008 | $106,273 | 90,031 | 11,646 |
| 2009 | $82,074 | 140,996 | 8,033 |
| 2010 | $79,695 | 58,237 | 7,128 |
| 2011 | $75,238 | 25,559 | 6,282 |
Note: Quantity represents Number of pairs
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