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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $23,252 | 860 | 304 |
| 2006 | $427,956 | 12,942 | 12,730 |
| 2007 | $906,839 | 45,280 | 255,626 |
| 2008 | $143,328 | 5,008 | 8,371 |
| 2009 | $288,548 | 7,034 | 18,218 |
| 2010 | $101,263 | 2,571 | 7,716 |
| 2011 | $79,609 | 2,058 | 565 |
Note: Quantity represents Number of pairs
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