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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,338,041,546 | 61,464,252 | 61,464,252 |
| 2006 | $7,649,518,825 | 88,079,486 | 88,079,486 |
| 2007 | $9,536,990,317 | 69,420,533 | 69,420,533 |
| 2008 | $10,303,915,997 | 0 | 0 |
| 2009 | $8,615,612,177 | 0 | 0 |
| 2010 | $11,212,026,180 | 252,726,047 | 252,726,047 |
| 2011 | $12,586,568,473 | 251,033,440 | 251,033,440 |
Note: Quantity represents Weight in kilograms
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