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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,076,000 | 182,047 | 215,413 |
| 2006 | $3,715,000 | 159,786 | 196,334 |
| 2007 | $5,397,000 | 188,167 | 282,819 |
| 2008 | $5,727,000 | 184,058 | 251,584 |
| 2009 | $4,185,000 | 158,176 | 180,752 |
| 2010 | $3,968,000 | 166,900 | 147,963 |
| 2011 | $4,105,000 | 156,514 | 153,214 |
Note: Quantity represents Number of pairs
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