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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,782,125,472 | 560,283,476 | 560,283,476 |
| 2006 | $7,384,435,755 | 479,870,669 | 479,870,669 |
| 2007 | $9,030,890,399 | 0 | 0 |
| 2008 | $10,024,694,970 | 0 | 0 |
| 2009 | $7,510,085,940 | 408,317,488 | 408,317,488 |
| 2010 | $6,902,180,102 | 370,845,756 | 370,845,756 |
| 2011 | $6,764,941,866 | 337,950,884 | 337,950,884 |
Note: Quantity represents Weight in kilograms
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