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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $127,000 | 6,865 | 7,321 |
| 2006 | $13,964 | 480 | 805 |
| 2007 | $163,290 | 5,336 | 3,857 |
| 2008 | $98,442 | 2,680 | 1,641 |
| 2009 | $24,566 | 1,610 | 337 |
| 2010 | $113,281 | 2,569 | 1,615 |
| 2011 | $249,612 | 12,751 | 3,822 |
Note: Quantity represents Number of pairs
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