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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $308,089 | 4,613 | 40,079 |
| 2006 | $300,253 | 4,566 | 19,330 |
| 2007 | $299,354 | 4,108 | 0 |
| 2008 | $358,180 | 4,209 | 6,530 |
| 2009 | $233,466 | 2,957 | 9,595 |
| 2010 | $289,016 | 3,743 | 9,438 |
| 2011 | $496,459 | 6,028 | 11,555 |
Note: Quantity represents Number of pairs
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