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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $225,929 | 11,696 | 22,690 |
| 2006 | $197,003 | 8,923 | 19,785 |
| 2007 | $93,101 | 2,855 | 4,467 |
| 2008 | $10,691 | 573 | 920 |
| 2009 | $25,553 | 1,842 | 4,623 |
| 2010 | $12,451 | 2,635 | 3,324 |
| 2011 | $27,638 | 1,370 | 3,482 |
Note: Quantity represents Number of pairs
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