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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $123,039 | 9,746 | 13,494 |
| 2006 | $115,805 | 8,131 | 4,965 |
| 2007 | $216,315 | 16,868 | 19,756 |
| 2008 | $677,304 | 47,365 | 44,969 |
| 2009 | $1,145,293 | 76,242 | 103,657 |
| 2010 | $1,266,897 | 67,615 | 72,884 |
| 2011 | $854,394 | 28,498 | 36,396 |
Note: Quantity represents Number of pairs
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