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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $423,618,000 | 446,799,974 | 446,799,974 |
| 2006 | $464,166,000 | 477,134,900 | 477,134,900 |
| 2007 | $500,100,000 | 444,285,000 | 444,285,000 |
| 2008 | $518,427,000 | 458,332,000 | 458,332,000 |
| 2009 | $497,944,000 | 476,469,300 | 476,469,300 |
| 2010 | $576,840,309 | 506,208,600 | 506,208,600 |
| 2011 | $486,814,367 | 489,060,597 | 489,060,597 |
Note: Quantity represents Weight in kilograms
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