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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $66,052 | 59,637 | 82,077 |
| 2006 | $135,433 | 134,566 | 13,580 |
| 2007 | $358,877 | 382,640 | 27,864 |
| 2008 | $487,268 | 465,732 | 35,514 |
| 2009 | $460,996 | 598,339 | 30,847 |
| 2010 | $237,716 | 357,099 | 14,491 |
Note: Quantity represents Number of pairs
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