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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $75,584 | 21,059 | 28,172 |
| 2006 | $416,071 | 107,345 | 69,332 |
| 2007 | $46,747 | 27,465 | 5,958 |
| 2008 | $34,434 | 5,992 | 0 |
| 2009 | $110,605 | 99,246 | 6,571 |
| 2010 | $23,438 | 23,531 | 1,358 |
| 2011 | $33,732 | 29,586 | 1,957 |
Note: Quantity represents Number of pairs
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