2004 2005 2006 2007 2008 2009 2010 2011 $0 $10,000 $20,000 $30,000 $40,000 $50,000 $60,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $51,018 | 1,992 | 623 |
| 2006 | $36,319 | 432 | 2,338 |
| 2007 | $2,935 | 46 | 0 |
| 2008 | $5,757 | 469 | 0 |
| 2009 | $3,034 | 1,449 | 0 |
| 2010 | $42,900 | 2,596 | 0 |
Note: Quantity represents Number of pairs
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