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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $117,615 | 8,448 | 8,969 |
| 2006 | $150,977 | 8,949 | 11,513 |
| 2007 | $90,983 | 4,891 | 6,263 |
| 2008 | $103,819 | 8,833 | 5,243 |
| 2009 | $98,676 | 5,702 | 4,408 |
| 2010 | $66,526 | 17,413 | 2,997 |
| 2011 | $39,027 | 1,565 | 1,870 |
Note: Quantity represents Number of pairs
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