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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $26,680 | 3,980 | 1,807 |
| 2006 | $20,395 | 2,622 | 1,381 |
| 2007 | $45,646 | 4,059 | 2,136 |
| 2008 | $77,622 | 6,762 | 3,894 |
| 2009 | $43,751 | 3,067 | 1,808 |
| 2010 | $48,938 | 5,124 | 1,856 |
| 2011 | $147,810 | 13,985 | 7,211 |
Note: Quantity represents Number of pairs
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