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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $86,265,847 | 480,450,153 | 480,450,153 |
| 2006 | $112,936,064 | 613,211,750 | 613,211,750 |
| 2007 | $233,492,812 | 813,506,701 | 813,506,701 |
| 2008 | $181,899,882 | 452,039,850 | 452,039,850 |
| 2009 | $209,305,888 | 826,246,744 | 826,246,744 |
| 2010 | $291,932,883 | 1,039,805,196 | 1,039,805,196 |
| 2011 | $404,145,981 | 1,057,312,460 | 1,057,312,460 |
Note: Quantity represents Weight in kilograms
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