2004 2005 2006 2007 2008 2009 2010 2011 $0 $5,000,000 $10,000,000 $15,000,000 $20,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $13,881,602 | 2,130,561 | 2,130,561 |
| 2006 | $11,764,658 | 1,883,603 | 1,883,603 |
| 2007 | $10,724,502 | 1,478,900 | 1,478,900 |
| 2008 | $11,269,914 | 1,298,644 | 1,298,644 |
| 2009 | $6,639,168 | 837,818 | 837,818 |
| 2010 | $6,731,731 | 997,103 | 997,103 |
Note: Quantity represents Weight in kilograms
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