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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $677,658,558 | 23,672 | 23,672 |
| 2006 | $776,299,165 | 21,373 | 21,373 |
| 2007 | $1,051,936,990 | 26,692 | 26,692 |
| 2008 | $1,387,384,505 | 28,203 | 28,203 |
| 2009 | $1,444,814,640 | 38,070 | 38,070 |
| 2010 | $2,621,407,155 | 49,648 | 49,648 |
| 2011 | $2,963,264,616 | 52,256 | 52,256 |
Note: Quantity represents Weight in kilograms
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