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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $12,554 | 886 | 886 |
| 2006 | $13,035 | 846 | 846 |
| 2007 | $18,610 | 1,239 | 1,239 |
| 2008 | $25,811 | 1,475 | 1,475 |
| 2009 | $29,909 | 156,138 | 156,138 |
| 2010 | $20,905 | 31,427 | 31,427 |
| 2011 | $71,825 | 70,136 | 70,136 |
Note: Quantity represents Weight in kilograms
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