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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,175,655,894 | 369,360,164 | 369,360,164 |
| 2006 | $1,459,627,127 | 387,857,570 | 387,857,570 |
| 2007 | $1,691,732,004 | 408,199,724 | 408,199,724 |
| 2008 | $1,645,437,586 | 388,157,496 | 388,157,496 |
| 2009 | $1,113,844,106 | 360,034,398 | 360,034,398 |
| 2010 | $1,398,770,124 | 399,009,369 | 399,009,369 |
| 2011 | $1,724,906,535 | 427,589,000 | 427,589,000 |
Note: Quantity represents Weight in kilograms
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