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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $12,507 | 653 | 2,382 |
| 2006 | $44,189 | 2,306 | 8,416 |
| 2007 | $132,660 | 62,687 | 26,868 |
| 2008 | $186,104 | 8,054 | 1,026,873 |
| 2009 | $528,582 | 20,621 | 260,139 |
| 2010 | $159,134 | 135,881 | 688,750 |
| 2011 | $93,641 | 45,528 | 0 |
Note: Quantity represents Number of pairs
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