2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $50,000 $100,000 $150,000 $200,000 $250,000 $300,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $78,742 | 221,555 | 221,555 |
| 2006 | $126,929 | 276,619 | 276,619 |
| 2007 | $114,762 | 259,699 | 259,699 |
| 2008 | $209,407 | 1,040,764 | 1,040,764 |
| 2009 | $252,396 | 903,300 | 903,300 |
| 2010 | $255,537 | 436,280 | 436,280 |
| 2011 | $66,558 | 177,325 | 177,325 |
Note: Quantity represents Weight in kilograms
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