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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $46,985 | 2,637 | 1,224 |
| 2006 | $100,004 | 13,930 | 5,607 |
| 2007 | $28,238 | 2,180 | 1,198 |
| 2008 | $273,266 | 20,025 | 8,606 |
| 2009 | $72,569 | 6,057 | 2,809 |
| 2010 | $60,076 | 4,963 | 1,944 |
| 2011 | $88,893 | 6,192 | 3,098 |
Note: Quantity represents Number of pairs
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