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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $93,878 | 4,318 | 10,160 |
| 2006 | $122,999 | 5,658 | 19,949 |
| 2007 | $180,424 | 0 | 23,995 |
| 2008 | $404,257 | 0 | 117,896 |
| 2009 | $135,110 | 0 | 23,384 |
| 2010 | $323,179 | 7,927 | 54,384 |
| 2011 | $208,270 | 0 | 56,067 |
Note: Quantity represents Number of pairs
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