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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $40,083 | 4,498 | 1,519 |
| 2006 | $62,171 | 6,793 | 3,735 |
| 2007 | $123,454 | 12,415 | 5,254 |
| 2008 | $145,729 | 19,453 | 6,081 |
| 2009 | $115,083 | 13,609 | 4,376 |
| 2010 | $106,632 | 14,738 | 4,074 |
| 2011 | $166,468 | 18,839 | 7,136 |
Note: Quantity represents Number of pairs
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