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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $548,220 | 743 | 50,667 |
| 2006 | $846,999 | 1,119 | 48,823 |
| 2007 | $582,886 | 777 | 13,769 |
| 2008 | $605,576 | 7,765 | 3,586 |
| 2009 | $734,981 | 9,682 | 14,740 |
| 2010 | $84,806 | 1,110 | 583 |
| 2011 | $56,193 | 906 | 504 |
Note: Quantity represents Number of pairs
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