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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,724,032,711 | 737,521,729 | 737,521,729 |
| 2006 | $4,046,256,484 | 659,125,891 | 659,125,891 |
| 2007 | $4,287,042,847 | 2,158,539 | 2,158,539 |
| 2008 | $4,330,883,145 | 496,610,132 | 496,610,132 |
| 2009 | $3,741,067,800 | 392,978,867 | 392,978,867 |
| 2010 | $4,678,768,497 | 497,172,208 | 497,172,208 |
| 2011 | $5,156,713,063 | 551,619,162 | 551,619,162 |
Note: Quantity represents Weight in kilograms
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