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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $295,512 | 24,483 | 24,001 |
| 2006 | $100,315 | 5,448 | 85,506 |
| 2007 | $124,779 | 7,996 | 80,598 |
| 2008 | $44,992 | 2,706 | 4,073 |
| 2009 | $347,152 | 19,443 | 51,307 |
| 2010 | $226,103 | 11,372 | 16,911 |
| 2011 | $98,836 | 6,173 | 12,609 |
Note: Quantity represents Number of pairs
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