2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $5,000,000 $10,000,000 $15,000,000 $20,000,000 $25,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $16,634,943 | 1,135,961 | 1,135,961 |
| 2006 | $16,873,893 | 910,115 | 910,115 |
| 2007 | $16,726,854 | 825,331 | 825,331 |
| 2008 | $16,402,842 | 812,671 | 812,671 |
| 2009 | $13,003,166 | 720,767 | 720,767 |
| 2010 | $13,141,669 | 681,549 | 681,549 |
| 2011 | $18,927,181 | 941,441 | 941,441 |
Note: Quantity represents Weight in kilograms
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