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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $61,683 | 9,420 | 9,768 |
| 2006 | $30,094 | 2,810 | 3,493 |
| 2007 | $31,900 | 3,723 | 4,266 |
| 2008 | $56,738 | 6,704 | 6,159 |
| 2009 | $24,696 | 1,630 | 2,442 |
| 2010 | $51,164 | 5,873 | 4,887 |
| 2011 | $44,042 | 4,332 | 4,456 |
Note: Quantity represents Number of pairs
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