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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $130,675 | 14,355 | 20,496 |
| 2006 | $201,434 | 18,791 | 23,072 |
| 2007 | $249,407 | 27,378 | 28,879 |
| 2008 | $240,475 | 22,891 | 25,433 |
| 2009 | $310,751 | 17,401 | 16,323 |
| 2010 | $148,938 | 19,618 | 20,779 |
| 2011 | $81,579 | 5,974 | 6,068 |
Note: Quantity represents Number of pairs
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