2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $20,000,000 $40,000,000 $60,000,000 $80,000,000 $100,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,486,231 | 409,414 | 409,414 |
| 2006 | $4,026,952 | 1,053,556 | 1,053,556 |
| 2007 | $20,458,574 | 1,974,204 | 1,974,204 |
| 2008 | $80,283,428 | 4,556,314 | 4,556,314 |
| 2009 | $71,567,570 | 3,147,772 | 3,147,772 |
| 2010 | $65,537,873 | 3,074,890 | 3,074,890 |
| 2011 | $77,290,195 | 3,348,733 | 3,348,733 |
Note: Quantity represents Weight in kilograms
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