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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $72,000 | 9,154 | 4,877 |
| 2006 | $83,000 | 6,865 | 5,622 |
| 2007 | $307,000 | 27,778 | 14,365 |
| 2008 | $135,000 | 12,611 | 6,773 |
| 2009 | $78,000 | 6,864 | 3,224 |
| 2010 | $148,000 | 22,557 | 5,613 |
| 2011 | $269,000 | 31,754 | 13,123 |
Note: Quantity represents Number of pairs
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