2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $50,000,000 $100,000,000 $150,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $32,949,793 | 394,293 | 394,293 |
| 2006 | $42,191,582 | 384,663 | 384,663 |
| 2007 | $57,536,656 | 523,803 | 523,803 |
| 2008 | $72,017,165 | 564,952 | 564,952 |
| 2009 | $83,909,597 | 501,265 | 501,265 |
| 2010 | $111,608,974 | 704,395 | 704,395 |
| 2011 | $132,756,841 | 647,313 | 647,313 |
Note: Quantity represents Weight in kilograms
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