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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $414,522,000 | 232,154,980 | 232,154,980 |
| 2006 | $462,288,000 | 242,003,947 | 242,003,947 |
| 2007 | $540,189,000 | 260,485,082 | 260,485,082 |
| 2008 | $643,103,000 | 263,450,200 | 263,450,200 |
| 2009 | $480,364,000 | 250,232,500 | 250,232,500 |
| 2010 | $577,142,377 | 265,336,200 | 265,336,200 |
| 2011 | $764,754,078 | 315,092,349 | 315,092,349 |
Note: Quantity represents Weight in kilograms
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