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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,919,890,475 | 2,259,499,482 | 2,259,499,482 |
| 2006 | $2,289,768,954 | 2,289,993,189 | 2,289,993,189 |
| 2007 | $2,509,280,039 | 2,348,408,544 | 2,348,408,544 |
| 2008 | $2,686,810,539 | 2,284,502,912 | 2,284,502,912 |
| 2009 | $2,322,408,250 | 2,535,042,850 | 2,535,042,850 |
| 2010 | $2,378,968,163 | 2,342,395,613 | 2,342,395,613 |
| 2011 | $3,880,039,979 | 2,555,478,528 | 2,555,478,528 |
Note: Quantity represents Weight in kilograms
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