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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $112,376 | 82,188 | 17,970 |
| 2006 | $122,812 | 106,668 | 19,639 |
| 2007 | $302,871 | 165,391 | 44,050 |
| 2008 | $475,563 | 302,548 | 58,329 |
| 2009 | $251,571 | 154,923 | 29,257 |
| 2011 | $232,459 | 153,548 | 26,739 |
Note: Quantity represents Number of pairs
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