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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $800,902 | 468,388 | 625,572 |
| 2006 | $758,113 | 437,109 | 553,927 |
| 2007 | $726,834 | 166,293 | 222,610 |
| 2008 | $1,132,071 | 239,857 | 326,819 |
| 2009 | $873,316 | 121,024 | 179,239 |
| 2011 | $992,757 | 108,181 | 146,136 |
Note: Quantity represents Number of pairs
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