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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,131,133,266 | 16,189,799,205 | 16,189,799,205 |
| 2006 | $871,762,279 | 13,100,037,650 | 13,100,037,650 |
| 2007 | $788,412,922 | 9,504,909,470 | 9,504,909,470 |
| 2008 | $1,035,609,024 | 6,702,229,832 | 6,702,229,832 |
| 2009 | $712,562,340 | 6,530,320,462 | 6,530,320,462 |
| 2010 | $813,019,673 | 8,475,437,139 | 8,475,437,139 |
| 2011 | $650,769,875 | 4,959,366,590 | 4,959,366,590 |
Note: Quantity represents Weight in kilograms
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