2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $50,000,000 $100,000,000 $150,000,000 $200,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $95,014,844 | 93,518,501 | 93,518,501 |
| 2006 | $97,688,113 | 83,070,839 | 83,070,839 |
| 2007 | $125,617,998 | 93,052,515 | 93,052,515 |
| 2008 | $148,940,486 | 103,873,202 | 103,873,202 |
| 2009 | $157,500,659 | 116,378,444 | 116,378,444 |
| 2010 | $157,876,143 | 122,230,123 | 122,230,123 |
| 2011 | $179,015,489 | 123,879,586 | 123,879,586 |
Note: Quantity represents Weight in kilograms
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