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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $804,627 | 66,246 | 157,339 |
| 2006 | $1,376,339 | 58,101 | 110,976 |
| 2007 | $2,643,087 | 113,007 | 192,058 |
| 2008 | $5,071,438 | 330,790 | 729,438 |
| 2009 | $4,362,859 | 431,397 | 723,733 |
| 2010 | $5,271,696 | 561,388 | 1,055,442 |
| 2011 | $10,851,972 | 902,589 | 1,462,567 |
Note: Quantity represents Number of pairs
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