2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $500,000 $1,000,000 $1,500,000 $2,000,000 $2,500,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,143,000 | 98,578 | 137,964 |
| 2006 | $1,153,000 | 53,038 | 74,229 |
| 2007 | $873,000 | 0 | 51,453 |
| 2008 | $674,000 | 0 | 43,749 |
| 2009 | $438,000 | 0 | 0 |
| 2010 | $869,000 | 21,316 | 84,862 |
| 2011 | $1,054,000 | 0 | 0 |
Note: Quantity represents Number of pairs
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