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| Year | Trade Value | Weight (kg) | Quantity |
| 2007 | $391,247,000 | 462,505,500 | 462,505,500 |
| 2008 | $397,720,000 | 405,657,440 | 405,657,440 |
| 2009 | $179,980,000 | 216,934,300 | 216,934,300 |
| 2010 | $286,339,461 | 353,647,300 | 353,647,300 |
| 2011 | $343,519,494 | 357,980,051 | 357,980,051 |
Note: Quantity represents Weight in kilograms
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