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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $166,242 | 12,454 | 34,719 |
| 2006 | $54,129 | 7,825 | 11,886 |
| 2007 | $72,270 | 52,612 | 13,742 |
| 2008 | $47,747 | 26,758 | 5,857 |
| 2009 | $653,818 | 75,064 | 118,682 |
| 2010 | $219,418 | 84,582 | 119,335 |
| 2011 | $386,094 | 76,903 | 106,636 |
Note: Quantity represents Number of pairs
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