2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $50,000,000 $100,000,000 $150,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $76,442,351 | 18,256,606 | 18,256,606 |
| 2006 | $94,802,126 | 26,947,400 | 26,947,400 |
| 2007 | $114,733,751 | 22,752,216 | 22,752,216 |
| 2008 | $130,997,073 | 27,010,685 | 27,010,685 |
| 2009 | $99,949,950 | 23,379,748 | 23,379,748 |
| 2010 | $104,715,195 | 24,607,339 | 24,607,339 |
| 2011 | $109,696,097 | 20,594,145 | 20,594,145 |
Note: Quantity represents Weight in kilograms
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