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 | $33,198,462 | 2,865,016 | 2,865,016 |
| 2006 | $43,326,196 | 3,422,069 | 3,422,069 |
| 2007 | $35,438,105 | 4,748,756 | 4,748,756 |
| 2008 | $57,362,047 | 6,549,757 | 6,549,757 |
| 2009 | $32,055,219 | 5,698,615 | 5,698,615 |
| 2010 | $24,825,947 | 3,468,266 | 3,468,266 |
Note: Quantity represents Weight in kilograms
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