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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,255,000 | 227,810 | 225,218 |
| 2006 | $2,868,000 | 161,738 | 286,441 |
| 2007 | $5,343,000 | 402,852 | 414,848 |
| 2008 | $7,297,000 | 430,087 | 531,830 |
| 2009 | $5,601,000 | 363,995 | 374,789 |
| 2010 | $3,877,000 | 237,422 | 236,339 |
| 2011 | $4,421,000 | 211,143 | 271,277 |
Note: Quantity represents Number of pairs
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