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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $72,660 | 20,138 | 9,442 |
| 2006 | $77,223 | 31,932 | 5,053 |
| 2007 | $111,944 | 42,875 | 14,971 |
| 2008 | $50,727 | 8,369 | 3,073 |
| 2009 | $57,953 | 26,988 | 8,365 |
| 2010 | $39,391 | 9,390 | 4,110 |
| 2011 | $42,207 | 13,867 | 5,608 |
Note: Quantity represents Number of pairs
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