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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,133,832,000 | 430,953,909 | 430,953,909 |
| 2006 | $4,714,578,000 | 455,551,655 | 455,551,655 |
| 2007 | $5,593,170,000 | 478,802,356 | 478,802,356 |
| 2008 | $6,352,275,000 | 488,150,963 | 488,150,963 |
| 2009 | $5,525,247,000 | 463,378,297 | 463,378,297 |
| 2010 | $6,191,167,982 | 493,660,998 | 493,660,998 |
| 2011 | $7,245,196,136 | 589,336,113 | 589,336,113 |
Note: Quantity represents Weight in kilograms
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