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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $802,447,814 | 656,792,200 | 656,792,200 |
| 2006 | $1,460,831,098 | 858,488,000 | 858,488,000 |
| 2007 | $1,510,159,293 | 698,416,200 | 698,416,200 |
| 2008 | $1,571,346,051 | 688,680,875 | 688,680,875 |
| 2009 | $706,654,609 | 449,395,700 | 449,395,700 |
| 2010 | $265,691,762 | 135,022,600 | 135,022,600 |
| 2011 | $216,565,653 | 90,889,100 | 90,889,100 |
Note: Quantity represents Weight in kilograms
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