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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $416,993 | 376,144 | 762,939 |
| 2006 | $774,897 | 847,085 | 1,171,640 |
| 2007 | $546,641 | 206,351 | 452,175 |
| 2008 | $1,083,988 | 232,339 | 547,415 |
| 2009 | $1,245,552 | 167,095 | 294,435 |
| 2010 | $252,054 | 136,314 | 310,354 |
| 2011 | $187,826 | 181,245 | 271,294 |
Note: Quantity represents Number of pairs
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