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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,864,080,813 | 5,421,864,170 | 5,421,864,170 |
| 2006 | $2,614,013,065 | 5,878,936,872 | 5,878,936,872 |
| 2007 | $3,012,188,613 | 6,141,237,725 | 6,141,237,725 |
| 2008 | $4,024,787,117 | 5,778,691,611 | 5,778,691,611 |
| 2009 | $2,397,770,047 | 5,787,735,595 | 5,787,735,595 |
| 2010 | $3,040,155,650 | 5,555,542,194 | 5,555,542,194 |
| 2011 | $4,652,709,013 | 5,988,119,743 | 5,988,119,743 |
Note: Quantity represents Weight in kilograms
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