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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $545,092,508 | 982,043,366 | 982,043,366 |
| 2006 | $749,726,875 | 1,053,834,564 | 1,053,834,564 |
| 2007 | $438,086,729 | 586,871,566 | 586,871,566 |
| 2008 | $88,957,441 | 82,987,520 | 82,987,520 |
| 2009 | $58,948,492 | 85,327,680 | 85,327,680 |
| 2010 | $264,295,908 | 317,308,881 | 317,308,881 |
| 2011 | $123,939,400 | 110,952,410 | 110,952,410 |
Note: Quantity represents Weight in kilograms
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