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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $12,029 | 2,680 | 3,436 |
| 2006 | $31,279 | 4,645 | 3,460 |
| 2008 | $44,631 | 6,834 | 3,640 |
| 2009 | $87,749 | 10,212 | 11,359 |
| 2010 | $27,545,696 | 2,308,457 | 1,477,771 |
| 2011 | $48,764,383 | 3,667,341 | 2,347,424 |
Note: Quantity represents Number of pairs
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