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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $604,570 | 225,078 | 267,068 |
| 2006 | $833,199 | 102,311 | 186,527 |
| 2007 | $1,574,104 | 107,711 | 156,414 |
| 2008 | $3,086,998 | 193,549 | 246,031 |
| 2009 | $1,093,724 | 72,191 | 132,062 |
| 2010 | $2,278,906 | 23,746 | 118,825 |
| 2011 | $597,131 | 29,408 | 79,464 |
Note: Quantity represents Number of pairs
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