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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $17,312,505,981 | 308,125,676 | 308,125,676 |
| 2006 | $23,969,021,544 | 422,964,009 | 422,964,009 |
| 2007 | $9,483,441,429 | 536,744,091 | 536,744,091 |
| 2008 | $10,818,947,429 | 569,516,156 | 569,516,156 |
| 2009 | $8,453,187,201 | 478,066,619 | 478,066,619 |
| 2010 | $10,981,104,698 | 571,024,269 | 571,024,269 |
| 2011 | $10,601,906,414 | 528,156,458 | 528,156,458 |
Note: Quantity represents Weight in kilograms
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