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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $40,451 | 1,734 | 4,912 |
| 2006 | $98,048 | 5,201 | 8,992 |
| 2007 | $85,297 | 3,408 | 5,179 |
| 2008 | $103,229 | 4,160 | 5,507 |
| 2009 | $84,421 | 2,885 | 4,940 |
| 2010 | $296,111 | 14,363 | 20,615 |
| 2011 | $197,017 | 5,232 | 8,448 |
Note: Quantity represents Number of pairs
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