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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,350,175,000 | 263,564,795 | 263,564,795 |
| 2006 | $1,649,564,000 | 305,499,826 | 305,499,826 |
| 2007 | $1,976,439,000 | 325,164,629 | 325,164,629 |
| 2008 | $2,191,270,000 | 332,196,706 | 332,196,706 |
| 2009 | $1,563,478,000 | 238,377,817 | 238,377,817 |
| 2010 | $2,046,364,943 | 335,996,174 | 335,996,174 |
| 2011 | $2,612,017,930 | 396,207,468 | 396,207,468 |
Note: Quantity represents Weight in kilograms
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