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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $42,318 | 8,294 | 7,597 |
| 2006 | $121,209 | 20,085 | 32,061 |
| 2007 | $42,273 | 3,013 | 5,388 |
| 2008 | $31,121 | 4,186 | 7,528 |
| 2009 | $41,007 | 17,735 | 9,493 |
| 2010 | $22,035 | 3,422 | 4,619 |
| 2011 | $16,838 | 2,693 | 4,257 |
Note: Quantity represents Number of pairs
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