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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $58,760 | 3,087 | 1,960 |
| 2006 | $113,160 | 5,945 | 26,495 |
| 2007 | $132,150 | 6,782 | 9,324 |
| 2008 | $144,579 | 5,432 | 10,396 |
| 2009 | $308,515 | 10,817 | 50,048 |
| 2010 | $365,036 | 19,209 | 25,921 |
| 2011 | $217,279 | 9,042 | 13,323 |
Note: Quantity represents Number of pairs
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