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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,705 | 690 | 943 |
| 2006 | $93,470 | 10,518 | 0 |
| 2007 | $660,653 | 123,935 | 178,766 |
| 2008 | $193,570 | 43,532 | 42,046 |
| 2009 | $33,243 | 1,860 | 2,796 |
| 2010 | $9,748 | 199 | 302 |
| 2011 | $126,514 | 2,739 | 2,148 |
Note: Quantity represents Number of pairs
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