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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $323,628 | 62,014 | 93,566 |
| 2006 | $297,453 | 64,383 | 93,088 |
| 2007 | $827,188 | 114,909 | 149,381 |
| 2008 | $845,687 | 113,711 | 161,708 |
| 2009 | $543,864 | 120,240 | 176,641 |
| 2010 | $372,092 | 75,314 | 108,435 |
| 2011 | $283,512 | 51,679 | 76,548 |
Note: Quantity represents Number of pairs
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