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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,285,042,000 | 558,921,923 | 558,921,923 |
| 2006 | $6,467,266,000 | 565,983,788 | 565,983,788 |
| 2007 | $7,834,645,000 | 572,542,565 | 572,542,565 |
| 2008 | $8,308,488,000 | 552,027,791 | 552,027,791 |
| 2009 | $5,568,848,000 | 347,109,234 | 347,109,234 |
| 2010 | $6,759,092,631 | 486,134,220 | 486,134,220 |
| 2011 | $8,743,292,381 | 603,439,537 | 603,439,537 |
Note: Quantity represents Weight in kilograms
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