2004 2005 2006 2007 2008 2009 2010 2011 $0 $50,000 $100,000 $150,000 $200,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $91,767 | 56,891 | 5,908 |
| 2006 | $179,133 | 14,791 | 11,532 |
| 2007 | $37,038 | 33,416 | 0 |
| 2008 | $107,338 | 31,814 | 0 |
| 2009 | $89,352 | 34,032 | 0 |
| 2010 | $27,936 | 18,646 | 0 |
Note: Quantity represents Number of pairs
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