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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $410,453,080 | 386,330,001 | 386,330,001 |
| 2006 | $867,020,334 | 401,268,739 | 401,268,739 |
| 2007 | $833,364,110 | 984,046,126 | 984,046,126 |
| 2008 | $487,010,606 | 344,511,647 | 344,511,647 |
| 2010 | $56,945,413 | 20,981,001 | 20,981,001 |
Note: Quantity represents Weight in kilograms
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