2004 2005 2006 2007 2008 2009 2010 2011 $0 $20,000 $40,000 $60,000 $80,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $41,729 | 9,113 | 2,686 |
| 2006 | $68,739 | 3,162 | 13,612 |
| 2007 | $38,979 | 0 | 0 |
| 2008 | $28,615 | 0 | 38,008 |
| 2009 | $42,191 | 0 | 0 |
| 2010 | $8,413 | 206 | 4,980 |
Note: Quantity represents Number of pairs
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