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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,104,194 | 127,541 | 70,510 |
| 2006 | $1,454,657 | 86,424 | 77,695 |
| 2007 | $2,587,053 | 95,969 | 146,899 |
| 2008 | $3,202,775 | 209,820 | 165,019 |
| 2009 | $1,924,427 | 58,000 | 79,647 |
| 2010 | $2,281,947 | 177,597 | 102,143 |
| 2011 | $1,619,926 | 134,902 | 74,397 |
Note: Quantity represents Number of pairs
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