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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,328,108,506 | 23,758,649 | 23,758,649 |
| 2006 | $1,414,868,802 | 17,987,529 | 17,987,529 |
| 2007 | $1,021,911,892 | 0 | 0 |
| 2008 | $890,909,591 | 0 | 0 |
| 2009 | $738,084,357 | 0 | 0 |
| 2010 | $854,785,415 | 0 | 0 |
| 2011 | $762,132,022 | 15,816,655 | 15,816,655 |
Note: Quantity represents Weight in kilograms
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