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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,172,015 | 300,061 | 210,070 |
| 2006 | $1,621,290 | 299,405 | 290,598 |
| 2007 | $3,695,237 | 606,617 | 535,609 |
| 2008 | $4,013,837 | 611,738 | 1,384,225 |
| 2009 | $4,108,052 | 558,203 | 384,957 |
| 2010 | $3,857,313 | 562,446 | 337,434 |
Note: Quantity represents Number of pairs
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