2004 2005 2006 2007 2008 2009 2010 $0 $20,000,000 $40,000,000 $60,000,000 $80,000,000 $100,000,000 $120,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $76,856,321 | 1,573,901 | 1,573,901 |
| 2006 | $86,613,591 | 1,611,862 | 1,611,862 |
| 2007 | $96,021,316 | 1,558,320 | 1,558,320 |
| 2008 | $83,397,427 | 2,155,349 | 2,155,349 |
| 2009 | $52,048,816 | 2,019,517 | 2,019,517 |
Note: Quantity represents Weight in kilograms
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