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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,799,217 | 235,591 | 410,204 |
| 2006 | $8,271,406 | 390,189 | 468,236 |
| 2007 | $9,767,780 | 347,690 | 490,212 |
| 2008 | $10,118,103 | 289,842 | 426,964 |
| 2009 | $9,603,766 | 272,954 | 384,064 |
| 2010 | $9,447,951 | 265,499 | 392,702 |
| 2011 | $12,007,863 | 325,237 | 530,353 |
Note: Quantity represents Number of pairs
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