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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $55,552 | 45,656 | 114,733 |
| 2006 | $155,761 | 86,566 | 201,589 |
| 2007 | $249,471 | 149,011 | 84,180 |
| 2008 | $97,506 | 11,577 | 59,684 |
| 2009 | $94,790 | 68,446 | 44,728 |
| 2010 | $78,872 | 28,635 | 63,023 |
| 2011 | $417,962 | 242,652 | 229,073 |
Note: Quantity represents Number of pairs
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