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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,696,012,677 | 8,066,869,938 | 8,066,869,938 |
| 2006 | $2,736,979,757 | 6,337,216,729 | 6,337,216,729 |
| 2007 | $2,538,309,104 | 5,782,245,452 | 5,782,245,452 |
| 2008 | $3,002,936,664 | 4,237,539,872 | 4,237,539,872 |
| 2009 | $2,155,728,744 | 5,072,465,883 | 5,072,465,883 |
| 2010 | $1,644,812,964 | 3,029,127,604 | 3,029,127,604 |
| 2011 | $1,905,683,970 | 2,514,344,217 | 2,514,344,217 |
Note: Quantity represents Weight in kilograms
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