2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $100,000 $200,000 $300,000 $400,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $205,152 | 9,583 | 26,688 |
| 2006 | $356,155 | 8,350 | 19,763 |
| 2007 | $354,480 | 8,722 | 12,541 |
| 2008 | $167,011 | 4,101 | 7,973 |
| 2009 | $156,826 | 3,957 | 0 |
| 2010 | $251,601 | 7,086 | 0 |
| 2011 | $286,310 | 9,198 | 0 |
Note: Quantity represents Number of pairs
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