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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $88,721 | 10,950 | 15,692 |
| 2006 | $251,990 | 14,590 | 23,773 |
| 2007 | $407,550 | 15,925 | 42,949 |
| 2008 | $341,092 | 46,843 | 63,413 |
| 2009 | $224,808 | 56,225 | 69,973 |
| 2010 | $219,230 | 62,836 | 87,889 |
| 2011 | $294,638 | 7,985 | 26,661 |
Note: Quantity represents Number of pairs
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