2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $10,000,000 $20,000,000 $30,000,000 $40,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $31,322,777 | 2,591,915 | 2,591,915 |
| 2006 | $31,170,650 | 2,979,338 | 2,979,338 |
| 2007 | $33,687,168 | 2,585,125 | 2,585,125 |
| 2008 | $25,785,884 | 1,902,159 | 1,902,159 |
| 2009 | $19,056,305 | 1,159,090 | 1,159,090 |
| 2010 | $16,272,352 | 1,025,357 | 1,025,357 |
| 2011 | $19,431,102 | 1,008,885 | 1,008,885 |
Note: Quantity represents Weight in kilograms
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