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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $684,065,475 | 195,441,987 | 195,441,987 |
| 2006 | $941,981,306 | 259,594,505 | 259,594,505 |
| 2007 | $1,255,373,648 | 376,741,628 | 376,741,628 |
| 2008 | $1,826,356,621 | 516,785,165 | 516,785,165 |
| 2009 | $1,911,015,850 | 423,095,975 | 423,095,975 |
| 2010 | $2,497,579,744 | 531,408,767 | 531,408,767 |
| 2011 | $3,355,535,163 | 705,701,790 | 705,701,790 |
Note: Quantity represents Weight in kilograms
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