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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $27,200 | 10,000 | 10,000 |
| 2006 | $35,200 | 12,536 | 12,536 |
| 2007 | $15,800 | 4,045 | 4,045 |
| 2008 | $158,700 | 26,952 | 26,952 |
| 2009 | $270,800 | 75,324 | 75,324 |
| 2010 | $208,600 | 53,368 | 53,368 |
| 2011 | $183,500 | 45,348 | 45,348 |
Note: Quantity represents Weight in kilograms
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