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
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $37,009,391 | 305,907 | 305,907 |
| 2006 | $37,388,472 | 306,597 | 306,597 |
| 2007 | $11,664,441 | 280,665 | 280,665 |
| 2008 | $18,123,592 | 295,538 | 295,538 |
| 2009 | $10,319,466 | 182,218 | 182,218 |
| 2010 | $13,822,344 | 181,557 | 181,557 |
| 2011 | $15,864,330 | 174,826 | 174,826 |
Note: Quantity represents Weight in kilograms
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