2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $10,000 $20,000 $30,000 $40,000 $50,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $29,603 | 11,732 | 11,732 |
| 2006 | $25,708 | 11,627 | 11,627 |
| 2007 | $32,001 | 10,611 | 10,611 |
| 2008 | $28,969 | 9,510 | 9,510 |
| 2009 | $37,746 | 12,520 | 12,520 |
| 2010 | $30,464 | 5,670 | 5,670 |
| 2011 | $27,640 | 7,712 | 7,712 |
Note: Quantity represents Weight in kilograms
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