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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $151 | 157 | 157 |
| 2006 | $957 | 3,105 | 3,105 |
| 2007 | $1,200 | 2,733 | 2,733 |
| 2008 | $1,539 | 3,463 | 3,463 |
| 2009 | $13,050 | 19,508 | 19,508 |
| 2010 | $54,399 | 38,776 | 38,776 |
| 2011 | $32,720 | 44,928 | 44,928 |
Note: Quantity represents Weight in kilograms
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