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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $21,289,470,363 | 414,330,288 | 414,330,288 |
| 2006 | $24,336,606,447 | 515,182,586 | 515,182,586 |
| 2007 | $17,985,513,718 | 435,910,210 | 435,910,210 |
| 2008 | $17,043,955,659 | 404,949,742 | 404,949,742 |
| 2009 | $15,644,304,751 | 356,878,895 | 356,878,895 |
| 2010 | $19,734,262,693 | 376,605,775 | 376,605,775 |
| 2011 | $19,466,413,261 | 354,884,847 | 354,884,847 |
Note: Quantity represents Weight in kilograms
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