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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $605,621,000 | 483,508,200 | 483,508,200 |
| 2006 | $1,027,956,000 | 597,310,481 | 597,310,481 |
| 2007 | $1,160,942,000 | 613,080,900 | 613,080,900 |
| 2008 | $1,017,325,000 | 543,837,400 | 543,837,400 |
| 2009 | $410,881,000 | 362,582,300 | 362,582,300 |
| 2010 | $743,017,568 | 479,416,019 | 479,416,019 |
| 2011 | $938,133,030 | 534,988,724 | 534,988,724 |
Note: Quantity represents Weight in kilograms
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