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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $53,423 | 90,074 | 90,670 |
| 2006 | $47,474 | 62,704 | 73,077 |
| 2007 | $16,583 | 8,875 | 8,738 |
| 2008 | $254,744 | 14,152 | 237,351 |
| 2009 | $68,683 | 3,723 | 4,596 |
| 2010 | $51,946 | 21,735 | 25,511 |
| 2011 | $92,013 | 35,704 | 50,619 |
Note: Quantity represents Number of pairs
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