2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $200,000 $400,000 $600,000 $800,000 $1,000,000 $1,200,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $232,972 | 857,488 | 857,488 |
| 2006 | $500,451 | 1,803,280 | 1,803,280 |
| 2007 | $913,677 | 3,033,389 | 3,033,389 |
| 2008 | $529,538 | 1,665,424 | 1,665,424 |
| 2009 | $920,486 | 4,679,403 | 4,679,403 |
| 2010 | $776,417 | 5,846,454 | 5,846,454 |
| 2011 | $418,039 | 2,584,142 | 2,584,142 |
Note: Quantity represents Weight in kilograms
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