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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,166,053 | 140,233 | 197,968 |
| 2006 | $7,460,226 | 163,729 | 160,387 |
| 2007 | $7,810,070 | 146,633 | 148,589 |
| 2008 | $8,421,912 | 181,840 | 150,608 |
| 2009 | $8,916,912 | 224,463 | 192,713 |
| 2010 | $10,492,706 | 243,821 | 224,608 |
| 2011 | $11,934,759 | 223,070 | 210,095 |
Note: Quantity represents Number of pairs
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