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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $41,729 | 8,936 | 26,346 |
| 2006 | $24,213 | 5,879 | 12,711 |
| 2007 | $32,267 | 11,378 | 8,020 |
| 2008 | $53,197 | 487,350 | 27,417 |
| 2009 | $155,553 | 44,325 | 52,016 |
| 2010 | $53,549 | 8,199 | 28,660 |
| 2011 | $14,860 | 2,800 | 2,180 |
Note: Quantity represents Number of pairs
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