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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,439,160,000 | 264,246,264 | 264,246,264 |
| 2006 | $1,644,724,000 | 262,656,715 | 262,656,715 |
| 2007 | $1,827,097,000 | 282,280,933 | 282,280,933 |
| 2008 | $2,360,075,000 | 318,797,124 | 318,797,124 |
| 2009 | $1,651,944,000 | 230,583,252 | 230,583,252 |
| 2010 | $1,714,508,662 | 252,192,098 | 252,192,098 |
| 2011 | $2,257,813,955 | 278,389,626 | 278,389,626 |
Note: Quantity represents Weight in kilograms
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