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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $769,309,000 | 374,769,300 | 374,769,300 |
| 2006 | $1,031,717,000 | 378,396,000 | 378,396,000 |
| 2007 | $1,104,068,000 | 361,921,600 | 361,921,600 |
| 2008 | $1,099,468,000 | 359,626,800 | 359,626,800 |
| 2009 | $598,757,000 | 288,022,600 | 288,022,600 |
| 2010 | $865,671,783 | 361,396,600 | 361,396,600 |
| 2011 | $1,046,003,992 | 369,896,676 | 369,896,676 |
Note: Quantity represents Weight in kilograms
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