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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,813,000 | 284,760 | 225,432 |
| 2006 | $5,237,385 | 177,745 | 203,109 |
| 2007 | $7,608,146 | 309,243 | 269,130 |
| 2008 | $9,311,120 | 281,112 | 310,126 |
| 2009 | $11,853,953 | 300,319 | 345,442 |
| 2010 | $13,587,307 | 359,058 | 417,494 |
| 2011 | $14,684,374 | 369,202 | 451,866 |
Note: Quantity represents Number of pairs
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