2004 2005 2006 2007 2008 2009 2010 2011 $0 $20,000,000 $40,000,000 $60,000,000 $80,000,000 $100,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,228,837 | 1,174,343 | 1,174,343 |
| 2006 | $32,882,878 | 5,341,906 | 5,341,906 |
| 2007 | $43,736,110 | 6,088,161 | 6,088,161 |
| 2008 | $52,317,151 | 6,291,169 | 6,291,169 |
| 2009 | $62,314,801 | 7,292,814 | 7,292,814 |
| 2010 | $82,261,560 | 9,814,272 | 9,814,272 |
Note: Quantity represents Weight in kilograms
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