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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $77,347 | 34,456 | 8,978 |
| 2006 | $47,354 | 4,803 | 5,497 |
| 2007 | $64,071 | 8,173 | 8,569 |
| 2008 | $96,448 | 15,211 | 10,469 |
| 2009 | $81,095 | 16,277 | 8,019 |
| 2010 | $144,740 | 40,060 | 13,826 |
| 2011 | $63,162 | 27,328 | 6,390 |
Note: Quantity represents Number of pairs
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