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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $229,945,009 | 13,331,085 | 11,978,300 |
| 2006 | $258,040,787 | 13,769,435 | 12,600,304 |
| 2007 | $255,258,620 | 10,391,698 | 10,219,765 |
| 2008 | $223,414,173 | 8,147,051 | 8,285,944 |
| 2009 | $188,620,060 | 7,619,235 | 7,768,382 |
| 2010 | $217,752,532 | 9,283,563 | 9,126,571 |
| 2011 | $296,841,403 | 10,870,366 | 10,395,546 |
Note: Quantity represents Number of pairs
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