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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $16,575,973 | 1,077,162 | 1,145,355 |
| 2006 | $7,512,909 | 437,373 | 641,292 |
| 2007 | $10,878,585 | 1,666,145 | 810,770 |
| 2008 | $9,245,659 | 629,247 | 939,559 |
| 2009 | $11,895,246 | 988,744 | 780,448 |
| 2010 | $25,152,940 | 1,063,091 | 1,172,484 |
| 2011 | $27,142,331 | 1,003,900 | 977,254 |
Note: Quantity represents Number of pairs
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