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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $17,034,970 | 410,932 | 731,338 |
| 2006 | $22,942,731 | 223,722 | 967,486 |
| 2007 | $33,816,122 | 1,277,460 | 1,342,132 |
| 2008 | $37,685,138 | 1,135,746 | 1,379,988 |
| 2009 | $34,954,747 | 827,368 | 1,137,006 |
| 2010 | $31,835,912 | 897,843 | 1,135,259 |
| 2011 | $33,768,889 | 912,118 | 1,211,208 |
Note: Quantity represents Number of pairs
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