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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,685,228,379 | 38,268,626 | 38,268,626 |
| 2006 | $1,850,603,350 | 72,175,400 | 72,175,400 |
| 2007 | $1,268,911,909 | 39,761,372 | 39,761,372 |
| 2008 | $1,140,472,496 | 28,184,857 | 28,184,857 |
| 2009 | $748,011,558 | 18,794,509 | 18,794,509 |
| 2010 | $662,174,917 | 12,758,760 | 12,758,760 |
| 2011 | $658,162,393 | 9,948,915 | 9,948,915 |
Note: Quantity represents Weight in kilograms
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