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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $308,555 | 24,292 | 39,748 |
| 2006 | $160,040 | 12,600 | 20,616 |
| 2007 | $175,459 | 14,388 | 22,012 |
| 2008 | $396,668 | 26,323 | 43,468 |
| 2009 | $583,386 | 33,319 | 57,099 |
| 2010 | $558,630 | 31,161 | 49,962 |
| 2011 | $1,080,000 | 254,188 | 608,354 |
Note: Quantity represents Number of pairs
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