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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,070 | 3,753 | 3,373 |
| 2006 | $118,647 | 1,719 | 1,469 |
| 2007 | $9,261 | 844 | 196,137 |
| 2008 | $115,992 | 5,541 | 3,556 |
| 2009 | $19,166 | 1,727 | 792 |
| 2010 | $17,699 | 2,900 | 1,342 |
| 2011 | $26,326 | 3,537 | 1,384 |
Note: Quantity represents Number of pairs
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