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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $687,993 | 580,062 | 103,281 |
| 2006 | $371,111 | 447,032 | 55,711 |
| 2007 | $336,823 | 470,998 | 37,112 |
| 2008 | $536,848 | 469,134 | 51,217 |
| 2009 | $797,833 | 691,542 | 66,562 |
| 2010 | $651,827 | 701,478 | 0 |
| 2011 | $966,473 | 774,698 | 0 |
Note: Quantity represents Number of pairs
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