2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $20,000 $40,000 $60,000 $80,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $28,784 | 6,182 | 6,182 |
| 2006 | $32,017 | 6,213 | 6,213 |
| 2007 | $35,660 | 5,277 | 5,277 |
| 2008 | $41,463 | 7,314 | 7,314 |
| 2009 | $36,195 | 10,098 | 10,098 |
| 2010 | $49,195 | 29,018 | 29,018 |
| 2011 | $67,063 | 55,059 | 55,059 |
Note: Quantity represents Weight in kilograms
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