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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $219,739 | 11,468 | 40,903 |
| 2006 | $88,130 | 4,599 | 17,242 |
| 2007 | $86,266 | 4,879 | 10,311 |
| 2008 | $110,639 | 4,788 | 28,324 |
| 2009 | $232,751 | 9,080 | 31,806 |
| 2010 | $178,311 | 8,203 | 47,521 |
| 2011 | $224,230 | 9,632 | 77,129 |
Note: Quantity represents Number of pairs
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