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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $17,100 | 957,000 | 957,000 |
| 2006 | $5,100 | 192,000 | 192,000 |
| 2007 | $100 | 15 | 15 |
| 2008 | $32,300 | 1,980,000 | 1,980,000 |
| 2009 | $8,200 | 715,000 | 715,000 |
| 2010 | $266,700 | 25,088,700 | 25,088,700 |
| 2011 | $582,500 | 33,104,000 | 33,104,000 |
Note: Quantity represents Weight in kilograms
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