2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $10,000,000 $20,000,000 $30,000,000 $40,000,000 $50,000,000 $60,000,000 $70,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $32,082,215 | 12,553,996 | 12,553,996 |
| 2006 | $41,724,291 | 15,710,907 | 15,710,907 |
| 2007 | $54,915,690 | 18,053,736 | 18,053,736 |
| 2008 | $60,458,583 | 18,869,993 | 18,869,993 |
| 2009 | $31,938,724 | 9,292,170 | 9,292,170 |
| 2010 | $42,146,390 | 12,496,138 | 12,496,138 |
| 2011 | $52,831,357 | 14,512,812 | 14,512,812 |
Note: Quantity represents Weight in kilograms
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