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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,003,100,890 | 2,406,365,082 | 2,406,365,082 |
| 2006 | $1,183,568,614 | 2,264,968,317 | 2,264,968,317 |
| 2007 | $1,296,794,767 | 2,151,472,786 | 2,151,472,786 |
| 2008 | $1,466,946,690 | 2,100,366,326 | 2,100,366,326 |
| 2009 | $277,923,037 | 618,638,892 | 618,638,892 |
| 2010 | $559,170,586 | 1,019,491,949 | 1,019,491,949 |
| 2011 | $612,734,295 | 1,132,087,030 | 1,132,087,030 |
Note: Quantity represents Weight in kilograms
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