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 | $6,895,474 | 29,100,034 | 29,100,034 |
| 2006 | $6,946,558 | 25,971,035 | 25,971,035 |
| 2007 | $20,268,053 | 57,578,778 | 57,578,778 |
| 2008 | $16,985,970 | 35,335,057 | 35,335,057 |
| 2009 | $13,186,169 | 46,572,546 | 46,572,546 |
| 2010 | $12,307,975 | 46,328,711 | 46,328,711 |
| 2011 | $12,048,773 | 36,693,558 | 36,693,558 |
Note: Quantity represents Weight in kilograms
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