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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $797,453,704 | 2,273,000,000 | 2,273,000,000 |
| 2006 | $1,042,481,236 | 2,407,000,098 | 2,407,000,098 |
| 2007 | $1,191,327,976 | 2,643,315,810 | 2,643,315,810 |
| 2008 | $1,595,308,316 | 1,868,307,000 | 1,868,307,000 |
| 2009 | $1,078,953,802 | 2,475,000,000 | 2,475,000,000 |
| 2010 | $1,321,151,300 | 2,437,000,000 | 2,437,000,000 |
| 2011 | $1,709,223,457 | 2,967,504,286 | 2,967,504,286 |
Note: Quantity represents Weight in kilograms
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