2004 2005 2006 2007 2008 2009 2010 2011 $0 $10,000,000 $20,000,000 $30,000,000 $40,000,000 $50,000,000 $60,000,000 $70,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $29,627,912 | 25,516,290 | 25,516,290 |
| 2006 | $23,243,302 | 18,309,622 | 18,309,622 |
| 2007 | $26,696,685 | 18,424,388 | 18,424,388 |
| 2008 | $59,633,895 | 32,534,039 | 32,534,039 |
| 2009 | $29,174,831 | 18,420,058 | 18,420,058 |
| 2010 | $23,094,745 | 15,556,147 | 15,556,147 |
Note: Quantity represents Weight in kilograms
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