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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $467,432 | 81,731 | 131,624 |
| 2006 | $761,317 | 133,117 | 213,915 |
| 2007 | $2,448,581 | 372,119 | 612,941 |
| 2008 | $2,921,924 | 505,684 | 718,139 |
| 2009 | $934,565 | 129,539 | 87,066 |
| 2010 | $599,248 | 71,955 | 74,545 |
Note: Quantity represents Number of pairs
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