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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $560,979 | 50,631 | 47,732 |
| 2006 | $633,440 | 46,557 | 43,514 |
| 2007 | $968,606 | 62,231 | 44,874 |
| 2008 | $595,199 | 19,317 | 15,606 |
| 2009 | $27,570 | 623 | 164 |
| 2010 | $861,650 | 21,401 | 13,080 |
| 2011 | $164,400 | 8,443 | 11,017 |
Note: Quantity represents Number of pairs
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