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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $355,294 | 6,151 | 10,185 |
| 2006 | $579,998 | 6,711 | 9,829 |
| 2007 | $691,149 | 10,146 | 12,076 |
| 2008 | $407,398 | 1,893 | 2,952 |
| 2009 | $515,069 | 4,948 | 6,825 |
| 2010 | $433,589 | 3,708 | 4,113 |
| 2011 | $757,790 | 4,447 | 6,544 |
Note: Quantity represents Number of pairs
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