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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $9,986,697 | 162,385 | 359,136 |
| 2006 | $5,643,804 | 257,135 | 207,678 |
| 2007 | $9,534,071 | 385,969 | 295,948 |
| 2008 | $11,807,856 | 424,528 | 341,007 |
| 2009 | $9,794,629 | 407,760 | 289,477 |
| 2010 | $8,591,212 | 377,303 | 274,015 |
| 2011 | $7,513,238 | 270,255 | 199,489 |
Note: Quantity represents Number of pairs
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