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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $99,970 | 9,610 | 3,789 |
| 2006 | $113,904 | 13,138 | 4,317 |
| 2007 | $151,155 | 9,655 | 6,433 |
| 2008 | $222,671 | 15,430 | 9,292 |
| 2009 | $111,762 | 6,418 | 4,250 |
| 2010 | $362,522 | 30,710 | 13,852 |
| 2011 | $561,613 | 34,306 | 24,074 |
Note: Quantity represents Number of pairs
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