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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $25,000 | 6,667 | 1,693 |
| 2006 | $159,377 | 32,335 | 10,795 |
| 2007 | $178,792 | 36,658 | 8,366 |
| 2008 | $588,324 | 133,917 | 29,517 |
| 2009 | $643,155 | 152,610 | 26,584 |
| 2010 | $176,668 | 41,648 | 6,700 |
| 2011 | $218,464 | 64,993 | 10,658 |
Note: Quantity represents Number of pairs
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