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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $14,394,977 | 227,038 | 462,167 |
| 2006 | $15,559,107 | 240,094 | 234,753 |
| 2007 | $21,983,756 | 315,047 | 313,276 |
| 2008 | $33,671,035 | 447,709 | 490,218 |
| 2009 | $28,985,872 | 387,149 | 462,683 |
| 2010 | $29,202,902 | 386,829 | 424,732 |
Note: Quantity represents Number of pairs
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