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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,002,784,006 | 361,286,097 | 361,286,097 |
| 2006 | $1,312,041,730 | 382,861,715 | 382,861,715 |
| 2007 | $1,139,189,349 | 324,705,519 | 324,705,519 |
| 2008 | $992,790,063 | 214,976,103 | 214,976,103 |
| 2009 | $498,859,785 | 189,380,873 | 189,380,873 |
| 2010 | $750,497,957 | 232,643,060 | 232,643,060 |
| 2011 | $816,821,551 | 232,812,570 | 232,812,570 |
Note: Quantity represents Weight in kilograms
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