2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $500 $1,000 $1,500 $2,000 $2,500
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $761 | 87 | 87 |
| 2006 | $649 | 33 | 33 |
| 2007 | $679 | 128 | 128 |
| 2008 | $423 | 37 | 37 |
| 2009 | $1,478 | 53 | 53 |
| 2010 | $1,412 | 87 | 87 |
| 2011 | $2,103 | 139 | 139 |
Note: Quantity represents Weight in kilograms
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