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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $390,076 | 29,380 | 41,671 |
| 2006 | $468,298 | 39,106 | 54,885 |
| 2007 | $779,367 | 37,027 | 55,136 |
| 2008 | $1,137,658 | 41,834 | 46,395 |
| 2009 | $1,859,596 | 54,709 | 78,314 |
| 2010 | $1,982,428 | 83,681 | 121,395 |
| 2011 | $1,870,686 | 82,351 | 101,146 |
Note: Quantity represents Number of pairs
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