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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $22,599 | 3,951 | 5,006 |
| 2006 | $22,032 | 8,874 | 4,880 |
| 2007 | $5,740 | 3,496 | 1,091 |
| 2008 | $35,831 | 27,446 | 4,396 |
| 2009 | $163,342 | 136,176 | 15,050 |
| 2010 | $63,840 | 88,852 | 6,037 |
| 2011 | $321,509 | 132,388 | 40,685 |
Note: Quantity represents Number of pairs
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