2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $10,000 $20,000 $30,000 $40,000 $50,000 $60,000 $70,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $12,000 | 13,600 | 13,600 |
| 2006 | $11,000 | 8,500 | 8,500 |
| 2007 | $21,000 | 14,300 | 14,300 |
| 2008 | $9,000 | 5,500 | 5,500 |
| 2009 | $2,000 | 900 | 900 |
| 2010 | $62,000 | 55,800 | 55,800 |
| 2011 | $28,000 | 10,900 | 10,900 |
Note: Quantity represents Weight in kilograms
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