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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $381,584,972 | 10,567,000,000 | 10,567,000,000 |
| 2007 | $558,729,438 | 18,767,423,550 | 18,767,423,550 |
| 2008 | $773,625,393 | 10,952,532 | 10,952,532 |
| 2009 | $519,193,177 | 10,215,767,000 | 10,215,767,000 |
Note: Quantity represents Weight in kilograms
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