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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,000,433,340 | 34,252,624 | 34,252,624 |
| 2006 | $4,157,397,982 | 33,529,629 | 33,529,629 |
| 2007 | $4,535,655,114 | 34,374,100 | 34,374,100 |
| 2008 | $5,442,566,376 | 31,006,826 | 31,006,826 |
| 2009 | $7,416,999,288 | 31,313,668 | 31,313,668 |
| 2010 | $9,052,519,471 | 30,120,740 | 30,120,740 |
| 2011 | $11,053,461,613 | 31,247,244 | 31,247,244 |
Note: Quantity represents Weight in kilograms
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