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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $89,122 | 5,291 | 7,513 |
| 2006 | $224,487 | 13,683 | 12,224 |
| 2007 | $219,956 | 10,978 | 15,467 |
| 2008 | $287,321 | 14,276 | 37,138 |
| 2009 | $152,219 | 23,075 | 28,893 |
| 2010 | $146,484 | 22,046 | 36,661 |
| 2011 | $172,291 | 4,594 | 6,072 |
Note: Quantity represents Number of pairs
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