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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,379 | 794 | 1,230 |
| 2006 | $6,086 | 1,202 | 1,014 |
| 2007 | $56,077 | 7,005 | 7,148 |
| 2008 | $59,961 | 12,943 | 0 |
| 2009 | $78,151 | 10,316 | 4,643 |
| 2010 | $70,836 | 30,337 | 4,106 |
| 2011 | $69,744 | 11,157 | 4,047 |
Note: Quantity represents Number of pairs
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