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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $47,869 | 3,738 | 45,964 |
| 2006 | $29,280 | 2,287 | 6,432 |
| 2007 | $374,876 | 0 | 44,422 |
| 2008 | $185,916 | 12,643 | 21,497 |
| 2009 | $640,525 | 39,772 | 119,189 |
| 2010 | $1,019,810 | 56,438 | 159,102 |
| 2011 | $625,198 | 33,116 | 91,094 |
Note: Quantity represents Number of pairs
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