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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $632,748 | 582,504 | 1,254,982 |
| 2006 | $485,504 | 285,282 | 678,186 |
| 2007 | $900,249 | 401,593 | 1,019,070 |
| 2008 | $1,021,453 | 238,660 | 641,592 |
| 2009 | $916,795 | 188,434 | 529,135 |
| 2011 | $1,366,324 | 213,080 | 678,130 |
Note: Quantity represents Number of pairs
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