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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,667,818 | 364,002 | 193,316 |
| 2006 | $1,975,411 | 345,136 | 156,173 |
| 2007 | $3,903,449 | 543,252 | 237,890 |
| 2008 | $6,326,661 | 794,023 | 367,024 |
| 2009 | $5,422,404 | 775,371 | 415,522 |
| 2010 | $3,413,137 | 586,086 | 273,167 |
| 2011 | $3,101,786 | 507,967 | 213,366 |
Note: Quantity represents Number of pairs
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