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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $866,001 | 279,880 | 213,288 |
| 2006 | $936,225 | 279,392 | 198,978 |
| 2007 | $1,901,108 | 402,528 | 314,548 |
| 2008 | $2,988,181 | 442,571 | 363,861 |
| 2009 | $2,422,039 | 424,754 | 337,375 |
| 2010 | $2,980,946 | 506,320 | 419,399 |
| 2011 | $2,866,819 | 370,830 | 331,103 |
Note: Quantity represents Number of pairs
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