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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $62,174 | 1,336 | 2,461 |
| 2006 | $8,983 | 193 | 894 |
| 2007 | $300,271 | 0 | 13,517 |
| 2008 | $280,182 | 4,136 | 19,947 |
| 2009 | $95,099 | 1,117 | 2,198 |
| 2010 | $119,008 | 1,726 | 3,139 |
| 2011 | $1,319,464 | 21,255 | 22,609 |
Note: Quantity represents Number of pairs
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