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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,745,604 | 329,946 | 918,295 |
| 2006 | $2,729,948 | 330,274 | 1,020,890 |
| 2007 | $4,196,074 | 498,395 | 1,437,988 |
| 2008 | $7,260,592 | 480,496 | 1,293,744 |
| 2009 | $5,876,038 | 412,403 | 1,213,997 |
| 2010 | $4,662,791 | 381,734 | 1,173,055 |
| 2011 | $4,310,883 | 349,867 | 1,281,656 |
Note: Quantity represents Number of pairs
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