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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $145,882 | 82,696 | 11,778 |
| 2006 | $116,559 | 56,853 | 9,411 |
| 2007 | $134,945 | 56,400 | 15,358 |
| 2008 | $167,597 | 77,775 | 18,567 |
| 2009 | $141,265 | 57,455 | 13,327 |
| 2010 | $319,922 | 158,050 | 22,817 |
| 2011 | $217,051 | 99,053 | 25,523 |
Note: Quantity represents Number of pairs
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