2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $200,000 $400,000 $600,000 $800,000 $1,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $398,641 | 589,497 | 589,497 |
| 2006 | $593,737 | 865,028 | 865,028 |
| 2007 | $469,344 | 639,792 | 639,792 |
| 2008 | $836,181 | 791,265 | 791,265 |
| 2009 | $365,689 | 385,906 | 385,906 |
| 2010 | $835,180 | 849,978 | 849,978 |
| 2011 | $478,870 | 445,550 | 445,550 |
Note: Quantity represents Weight in kilograms
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