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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $652,045 | 40,785 | 44,555 |
| 2006 | $527,792 | 33,013 | 37,802 |
| 2007 | $701,378 | 49,597 | 29,108 |
| 2008 | $912,340 | 60,856 | 54,515 |
| 2009 | $625,731 | 66,455 | 23,793 |
| 2010 | $1,335,732 | 108,280 | 70,379 |
| 2011 | $1,483,743 | 96,984 | 63,972 |
Note: Quantity represents Number of pairs
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