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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,991,527,036 | 0 | 0 |
| 2006 | $5,347,699,771 | 0 | 93,970,067 |
| 2007 | $1,635,593,045 | 0 | 27,168,302 |
| 2008 | $1,929,289,199 | 0 | 21,845,034 |
| 2009 | $1,549,581,808 | 0 | 21,568,878 |
| 2010 | $1,073,206,561 | 0 | 16,900,359 |
Note: Quantity represents No Quantity
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