2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $20,000 $40,000 $60,000 $80,000 $100,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $13,800 | 584 | 584 |
| 2006 | $22,400 | 1,586 | 1,586 |
| 2007 | $49,900 | 3,842 | 3,842 |
| 2008 | $50,700 | 121,282 | 121,282 |
| 2009 | $50,400 | 2,280 | 2,280 |
| 2010 | $51,900 | 3,291 | 3,291 |
| 2011 | $77,800 | 8,327 | 8,327 |
Note: Quantity represents Weight in kilograms
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