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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $233,964,000 | 1,851,083,700 | 1,851,083,700 |
| 2006 | $305,218,000 | 2,296,732,500 | 2,296,732,500 |
| 2007 | $979,034,000 | 5,000,078,500 | 5,000,078,500 |
| 2008 | $841,089,000 | 3,311,009,900 | 3,311,009,900 |
| 2009 | $689,023,000 | 4,135,854,900 | 4,135,854,900 |
| 2010 | $686,321,000 | 3,813,193,800 | 3,813,193,800 |
| 2011 | $970,218,000 | 3,529,197,700 | 3,529,197,700 |
Note: Quantity represents Weight in kilograms
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