2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $50,000 $100,000 $150,000 $200,000 $250,000 $300,000 $350,000 $400,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $105,673 | 52,496 | 52,496 |
| 2006 | $323,235 | 173,453 | 173,453 |
| 2007 | $27,433 | 13,846 | 13,846 |
| 2008 | $220,007 | 146,093 | 146,093 |
| 2009 | $271,096 | 198,259 | 198,259 |
| 2010 | $144,226 | 96,429 | 96,429 |
| 2011 | $23,783 | 6,113 | 6,113 |
Note: Quantity represents Weight in kilograms
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