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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $651,555 | 58,699 | 152,914 |
| 2006 | $1,712,051 | 94,442 | 291,128 |
| 2007 | $3,141,570 | 152,815 | 473,828 |
| 2008 | $2,289,937 | 107,027 | 475,938 |
| 2009 | $1,816,833 | 73,347 | 371,786 |
| 2010 | $278,069 | 11,173 | 76,674 |
| 2011 | $513,475 | 21,080 | 28,053 |
Note: Quantity represents Number of pairs
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