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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $633,867 | 46,623 | 7,922 |
| 2006 | $492,345 | 30,223 | 6,153 |
| 2007 | $395,389 | 26,277 | 3,776 |
| 2008 | $431,941 | 19,665 | 3,541 |
| 2009 | $327,404 | 18,893 | 2,613 |
| 2010 | $117,168 | 15,425 | 955 |
| 2011 | $195,872 | 10,026 | 1,625 |
Note: Quantity represents Number of pairs
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