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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $114,433 | 9,829 | 9,403 |
| 2006 | $29,975 | 2,575 | 14,934 |
| 2007 | $555,891 | 50,665 | 59,104 |
| 2008 | $164,788 | 15,393 | 25,249 |
| 2009 | $128,113 | 11,991 | 18,420 |
| 2010 | $254,817 | 24,307 | 37,229 |
| 2011 | $870,040 | 94,434 | 149,934 |
Note: Quantity represents Number of pairs
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