2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $20,000,000 $40,000,000 $60,000,000 $80,000,000 $100,000,000 $120,000,000 $140,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $49,360,295 | 261,173 | 261,173 |
| 2006 | $69,195,433 | 142,931 | 142,931 |
| 2007 | $93,822,264 | 153,697 | 153,697 |
| 2008 | $99,104,850 | 142,220 | 142,220 |
| 2009 | $116,796,101 | 185,422 | 185,422 |
| 2010 | $87,978,854 | 121,914 | 121,914 |
| 2011 | $67,155,993 | 109,261 | 109,261 |
Note: Quantity represents Weight in kilograms
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