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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $158,869 | 4,939 | 5,090 |
| 2006 | $179,485 | 7,382 | 8,915 |
| 2007 | $117,294 | 2,958 | 3,810 |
| 2008 | $93,250 | 2,470 | 2,244 |
| 2009 | $288,887 | 17,505 | 30,495 |
| 2010 | $331,682 | 19,697 | 23,394 |
| 2011 | $244,538 | 20,788 | 15,857 |
Note: Quantity represents Number of pairs
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