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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $133 | 2,912 | 2,912 |
| 2006 | $46 | 845 | 845 |
| 2007 | $15,603 | 24,414 | 24,414 |
| 2008 | $17,600 | 304,769 | 304,769 |
| 2009 | $88,244 | 22,725,868 | 22,725,868 |
| 2010 | $61,130 | 13,586 | 13,586 |
| 2011 | $731,297 | 67,667,126 | 67,667,126 |
Note: Quantity represents Weight in kilograms
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