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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $495,400,000 | 408,532,000 | 408,532,000 |
| 2006 | $446,567,000 | 382,962,730 | 382,962,730 |
| 2007 | $511,931,000 | 367,947,806 | 367,947,806 |
| 2008 | $586,441,000 | 356,007,700 | 356,007,700 |
| 2009 | $516,735,000 | 350,065,200 | 350,065,200 |
| 2010 | $505,701,868 | 366,967,800 | 366,967,800 |
| 2011 | $527,448,883 | 347,274,317 | 347,274,317 |
Note: Quantity represents Weight in kilograms
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