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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $66,779 | 3,235 | 3,099 |
| 2006 | $110,633 | 3,863 | 4,290 |
| 2007 | $84,445 | 3,605 | 3,064 |
| 2008 | $59,101 | 3,316 | 1,968 |
| 2009 | $66,097 | 1,431 | 1,926 |
| 2010 | $144,811 | 8,781 | 4,450 |
| 2011 | $77,372 | 5,287 | 2,381 |
Note: Quantity represents Number of pairs
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