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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $302,796 | 353,699 | 831,711 |
| 2006 | $26,600 | 5,517 | 23,395 |
| 2007 | $7,088 | 1,295 | 3,632 |
| 2008 | $156,670 | 27,316 | 109,301 |
| 2009 | $192,956 | 128,422 | 131,285 |
| 2010 | $133,813 | 58,623 | 116,382 |
| 2011 | $34,827 | 27,007 | 11,369 |
Note: Quantity represents Number of pairs
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