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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $474,486 | 28,710 | 156,081 |
| 2006 | $513,349 | 27,927 | 88,894 |
| 2007 | $391,808 | 17,305 | 27,588 |
| 2008 | $381,607 | 17,304 | 53,136 |
| 2009 | $320,910 | 16,884 | 59,998 |
| 2010 | $298,406 | 16,815 | 60,198 |
| 2011 | $292,846 | 11,499 | 60,556 |
Note: Quantity represents Number of pairs
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