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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $396,813 | 176,933 | 39,632 |
| 2006 | $1,087,745 | 92,779 | 108,638 |
| 2007 | $862,956 | 277,770 | 411,761 |
| 2008 | $689,477 | 1,502,957 | 2,227,396 |
| 2009 | $460,495 | 91,724 | 107,561 |
| 2010 | $931,070 | 160,148 | 241,755 |
| 2011 | $1,430,729 | 165,125 | 235,142 |
Note: Quantity represents Number of pairs
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