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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $614,700 | 57,848 | 118,713 |
| 2006 | $1,056,700 | 91,063 | 163,939 |
| 2007 | $1,386,900 | 119,410 | 226,185 |
| 2008 | $1,934,300 | 124,631 | 247,812 |
| 2009 | $2,906,000 | 153,697 | 373,522 |
| 2010 | $4,553,200 | 282,554 | 598,689 |
| 2011 | $8,220,000 | 384,511 | 722,512 |
Note: Quantity represents Number of pairs
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