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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $65,136,100 | 46,089,604 | 46,089,604 |
| 2006 | $55,555,100 | 41,581,129 | 41,581,129 |
| 2007 | $53,676,800 | 33,292,069 | 33,292,069 |
| 2008 | $59,866,400 | 30,617,174 | 30,617,174 |
| 2009 | $54,520,300 | 23,125,744 | 23,125,744 |
| 2010 | $68,719,500 | 26,199,089 | 26,199,089 |
| 2011 | $99,986,400 | 32,541,211 | 32,541,211 |
Note: Quantity represents Weight in kilograms
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