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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,024,314,453 | 10,785,475 | 10,785,475 |
| 2006 | $1,228,113,698 | 15,164,033 | 15,164,033 |
| 2007 | $1,060,708,641 | 14,282,898 | 14,282,898 |
| 2008 | $910,570,738 | 14,446,915 | 14,446,915 |
| 2009 | $1,072,226,657 | 15,949,746 | 15,949,746 |
| 2010 | $1,357,479,556 | 20,048,697 | 20,048,697 |
| 2011 | $1,674,571,304 | 21,582,196 | 21,582,196 |
Note: Quantity represents Weight in kilograms
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