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 | $82,431 | 99,441 | 99,441 |
| 2006 | $207,033 | 170,911 | 170,911 |
| 2007 | $241,409 | 108,781 | 108,781 |
| 2008 | $205,027 | 62,383 | 62,383 |
| 2009 | $3,838 | 1,799 | 1,799 |
| 2010 | $60,570 | 21,514 | 21,514 |
| 2011 | $169,018 | 55,357 | 55,357 |
Note: Quantity represents Weight in kilograms
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