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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $92,616 | 5,843 | 2,622 |
| 2006 | $65,794 | 4,151 | 1,780 |
| 2007 | $202,443 | 13,794 | 11,524 |
| 2008 | $524,722 | 31,732 | 57,063 |
| 2009 | $263,111 | 13,856 | 10,787 |
| 2010 | $1,026,236 | 59,781 | 48,427 |
| 2011 | $1,439,139 | 79,889 | 58,631 |
Note: Quantity represents Number of pairs
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