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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $97,258 | 4,152 | 9,244 |
| 2006 | $46,854 | 2,000 | 4,453 |
| 2007 | $101,672 | 59,391 | 9,851 |
| 2008 | $28,986 | 595 | 33,879 |
| 2009 | $22,338 | 411 | 23,009 |
| 2010 | $102,951 | 107,743 | 150,804 |
| 2011 | $7,686 | 13,028 | 244 |
Note: Quantity represents Number of pairs
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