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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $180,564 | 9,313 | 8,451 |
| 2006 | $92,903 | 9,922 | 6,897 |
| 2007 | $226,453 | 11,005 | 7,825 |
| 2008 | $188,456 | 1,753 | 2,009 |
| 2009 | $136,050 | 1,749 | 1,873 |
| 2010 | $538,253 | 4,433 | 3,508 |
| 2011 | $308,826 | 3,435 | 4,729 |
Note: Quantity represents Number of pairs
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