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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $470,215 | 32,158 | 33,645 |
| 2006 | $369,968 | 25,302 | 24,769 |
| 2007 | $367,938 | 26,497 | 27,852 |
| 2008 | $464,177 | 25,786 | 34,878 |
| 2009 | $441,840 | 23,949 | 31,647 |
| 2010 | $595,556 | 27,996 | 48,307 |
| 2011 | $968,012 | 42,104 | 72,738 |
Note: Quantity represents Number of pairs
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