2004 2005 2006 2007 2008 2009 2010 $0 $20,000 $40,000 $60,000 $80,000 $100,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $86,965 | 21,238 | 1,335 |
| 2006 | $47,788 | 34,036 | 94 |
| 2007 | $2,570 | 9,397 | 3 |
| 2008 | $21,822 | 20,626 | 0 |
| 2009 | $13,219 | 3,137 | 0 |
Note: Quantity represents Number of pairs
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