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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,675,766 | 425,292 | 613,586 |
| 2006 | $9,986,362 | 870,066 | 1,192,133 |
| 2007 | $13,257,209 | 952,898 | 1,230,450 |
| 2008 | $14,094,391 | 913,855 | 1,204,255 |
| 2009 | $13,752,563 | 1,015,603 | 1,388,133 |
| 2010 | $14,852,588 | 925,252 | 1,374,649 |
| 2011 | $17,729,275 | 1,290,702 | 1,780,198 |
Note: Quantity represents Number of pairs
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