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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,065,412,017 | 19,466,260,256 | 19,466,260,256 |
| 2006 | $1,332,877,140 | 20,092,279,560 | 20,092,279,560 |
| 2007 | $1,272,040,407 | 18,667,413,440 | 18,667,413,440 |
| 2008 | $2,274,962,728 | 0 | 0 |
| 2009 | $2,041,174,111 | 19,488,649,264 | 19,488,649,264 |
| 2010 | $2,232,677,715 | 21,387,494,593 | 21,387,494,593 |
| 2011 | $2,475,728,700 | 17,344,677,169 | 17,344,677,169 |
Note: Quantity represents Weight in kilograms
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