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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $150,142 | 4,532 | 6,515 |
| 2006 | $125,655 | 92,198 | 5,453 |
| 2007 | $270,822 | 33,909 | 9,363 |
| 2008 | $85,706 | 26,449 | 2,846 |
| 2009 | $23,784 | 13,068 | 647 |
| 2010 | $93,226 | 43,304 | 2,492 |
| 2011 | $193,383 | 27,110 | 5,215 |
Note: Quantity represents Number of pairs
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