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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $858,400 | 215,680 | 120,396 |
| 2006 | $3,094,500 | 711,614 | 407,701 |
| 2007 | $3,406,800 | 690,256 | 412,924 |
| 2008 | $3,946,500 | 864,599 | 919,373 |
| 2009 | $2,012,200 | 398,489 | 243,399 |
| 2010 | $2,183,500 | 469,854 | 283,028 |
| 2011 | $1,960,100 | 403,422 | 239,710 |
Note: Quantity represents Number of pairs
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