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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,031,041 | 70,512 | 199,802 |
| 2006 | $1,186,699 | 81,158 | 227,426 |
| 2007 | $1,161,079 | 83,616 | 272,403 |
| 2008 | $1,446,792 | 80,372 | 299,013 |
| 2009 | $1,132,531 | 61,386 | 229,487 |
| 2010 | $1,209,477 | 56,856 | 246,589 |
| 2011 | $1,956,335 | 85,091 | 393,108 |
Note: Quantity represents Number of pairs
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