2004 2005 2006 2007 2008 2009 2010 2011 $0 $5,000 $10,000 $15,000 $20,000 $25,000 $30,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $23,548 | 1,083 | 6,522 |
| 2006 | $1,512 | 70 | 547 |
| 2007 | $1,424 | 0 | 381 |
| 2008 | $3,689 | 0 | 2,262 |
| 2009 | $5,788 | 0 | 397 |
| 2010 | $6,800 | 167 | 523 |
Note: Quantity represents Number of pairs
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