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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $511,674,000 | 561,344,597 | 561,344,597 |
| 2006 | $710,682,000 | 745,067,048 | 745,067,048 |
| 2007 | $811,338,000 | 727,187,949 | 727,187,949 |
| 2008 | $975,102,000 | 716,570,570 | 716,570,570 |
| 2009 | $494,078,000 | 492,496,751 | 492,496,751 |
| 2010 | $680,762,370 | 629,547,909 | 629,547,909 |
| 2011 | $945,701,699 | 752,509,725 | 752,509,725 |
Note: Quantity represents Weight in kilograms
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