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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,800 | 1,133 | 1,133 |
| 2006 | $8,600 | 1,135 | 1,135 |
| 2007 | $24,600 | 3,461 | 3,461 |
| 2008 | $42,400 | 5,197 | 5,197 |
| 2009 | $53,600 | 10,027 | 10,027 |
| 2010 | $78,500 | 17,424 | 17,424 |
| 2011 | $32,200 | 1,055 | 1,055 |
Note: Quantity represents Weight in kilograms
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