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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,020,369 | 251,720 | 481,177 |
| 2006 | $7,526,185 | 240,057 | 231,419 |
| 2007 | $7,880,933 | 207,329 | 204,194 |
| 2008 | $9,569,389 | 226,037 | 230,622 |
| 2009 | $10,996,100 | 251,511 | 276,058 |
| 2010 | $8,339,567 | 239,381 | 201,007 |
| 2011 | $9,048,322 | 256,067 | 232,747 |
Note: Quantity represents Number of pairs
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