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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,703,685,709 | 271,557,645 | 271,557,645 |
| 2006 | $4,545,051,894 | 300,090,326 | 300,090,326 |
| 2007 | $5,647,091,256 | 303,159,499 | 303,159,499 |
| 2008 | $6,724,857,763 | 296,442,959 | 296,442,959 |
| 2009 | $5,439,077,931 | 250,999,232 | 250,999,232 |
| 2010 | $4,852,412,134 | 257,370,771 | 257,370,771 |
| 2011 | $5,551,512,452 | 268,449,635 | 268,449,635 |
Note: Quantity represents Weight in kilograms
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