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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,896,918 | 1,034,611 | 153,154 |
| 2006 | $2,047,821 | 993,773 | 165,337 |
| 2007 | $2,497,355 | 1,187,691 | 284,221 |
| 2008 | $2,980,903 | 1,280,360 | 330,243 |
| 2009 | $2,390,814 | 914,788 | 225,544 |
| 2010 | $3,686,705 | 1,378,582 | 262,934 |
Note: Quantity represents Number of pairs
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