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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $334,029,000 | 2,684,040,500 | 2,684,040,500 |
| 2006 | $341,291,000 | 2,628,100,200 | 2,628,100,200 |
| 2007 | $374,343,000 | 2,567,636,218 | 2,567,636,218 |
| 2008 | $476,840,000 | 2,489,458,400 | 2,489,458,400 |
Note: Quantity represents Weight in kilograms
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