2004 2005 2006 2007 2008 2009 2010 2011 $0 $50,000 $100,000 $150,000 $200,000 $250,000 $300,000 $350,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $175,442 | 8,070 | 11,295 |
| 2006 | $168,778 | 7,764 | 10,866 |
| 2007 | $156,495 | 0 | 0 |
| 2008 | $152,032 | 0 | 0 |
| 2009 | $209,972 | 0 | 0 |
| 2010 | $283,030 | 6,943 | 0 |
Note: Quantity represents Number of pairs
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