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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,784,536,645 | 3,445,965,872 | 3,445,965,872 |
| 2006 | $1,799,503,259 | 3,458,473,976 | 3,458,473,976 |
| 2007 | $2,084,138,159 | 3,219,887,944 | 3,219,887,944 |
| 2008 | $2,009,406,738 | 2,743,270,928 | 2,743,270,928 |
| 2009 | $1,278,699,617 | 2,177,461,976 | 2,177,461,976 |
| 2010 | $1,864,034,579 | 2,437,226,984 | 2,437,226,984 |
| 2011 | $1,895,778,464 | 2,443,992,944 | 2,443,992,944 |
Note: Quantity represents Weight in kilograms
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