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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,491,563 | 63,224 | 175,819 |
| 2006 | $1,358,603 | 57,588 | 197,052 |
| 2007 | $2,198,757 | 81,613 | 235,491 |
| 2008 | $2,634,545 | 96,339 | 264,240 |
| 2009 | $2,344,213 | 70,652 | 405,668 |
| 2010 | $2,777,963 | 88,306 | 124,345 |
| 2011 | $2,965,654 | 96,996 | 136,201 |
Note: Quantity represents Number of pairs
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