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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,787,214,009 | 35,434,447 | 35,434,447 |
| 2006 | $2,612,840,931 | 33,217,605 | 33,217,605 |
| 2007 | $2,119,429,827 | 0 | 0 |
| 2008 | $1,769,589,238 | 0 | 0 |
| 2009 | $1,397,566,781 | 0 | 0 |
| 2010 | $1,497,901,853 | 0 | 0 |
| 2011 | $1,328,637,794 | 0 | 0 |
Note: Quantity represents Weight in kilograms
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