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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $524,786 | 229,753 | 226,480 |
| 2006 | $619,072 | 265,430 | 267,171 |
| 2007 | $689,572 | 315,753 | 294,181 |
| 2008 | $454,317 | 180,744 | 152,691 |
| 2009 | $222,172 | 76,456 | 62,386 |
| 2010 | $2,415 | 397 | 657 |
| 2011 | $20,399 | 4,327 | 6,769 |
Note: Quantity represents Number of pairs
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