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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $27,652 | 2,757 | 1,420 |
| 2006 | $11,139 | 1,438 | 358 |
| 2007 | $168,911 | 11,577 | 3,774 |
| 2008 | $51,855 | 3,459 | 1,196 |
| 2009 | $198,808 | 18,757 | 3,793 |
| 2010 | $53,927 | 9,084 | 1,085 |
| 2011 | $43,954 | 2,297 | 867 |
Note: Quantity represents Number of pairs
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