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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $16,179,299 | 1,340,456 | 21,304,595 |
| 2006 | $21,282,065 | 1,155,873 | 12,280,135 |
| 2007 | $24,869,170 | 1,599,246 | 9,502,761 |
| 2008 | $30,020,340 | 1,044,675 | 0 |
| 2009 | $30,185,586 | 1,042,121 | 9,063,587 |
| 2010 | $37,027,099 | 1,557,980 | 8,702,653 |
| 2011 | $56,168,563 | 2,152,679 | 10,874,978 |
Note: Quantity represents Number of pairs
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