2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $100,000 $200,000 $300,000 $400,000 $500,000 $600,000 $700,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,575 | 1,920 | 1,920 |
| 2006 | $2,608 | 1,762 | 1,762 |
| 2007 | $614,254 | 2,192,273 | 2,192,273 |
| 2008 | $25,270 | 19,487 | 19,487 |
| 2009 | $211,384 | 559,606 | 559,606 |
| 2010 | $16,981 | 46,603 | 46,603 |
| 2011 | $148,575 | 602,440 | 602,440 |
Note: Quantity represents Weight in kilograms
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