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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,339,795,988 | 104,875,021 | 104,875,021 |
| 2006 | $2,065,123,588 | 127,768,844 | 127,768,844 |
| 2007 | $1,840,057,585 | 83,366,096 | 83,366,096 |
| 2008 | $1,738,285,953 | 50,570,562 | 50,570,562 |
| 2009 | $1,275,296,762 | 57,559,196 | 57,559,196 |
| 2010 | $1,526,725,178 | 110,441,535 | 110,441,535 |
| 2011 | $1,591,891,841 | 70,140,863 | 70,140,863 |
Note: Quantity represents Weight in kilograms
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