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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $373,900 | 66,139 | 59,108 |
| 2006 | $445,000 | 57,828 | 42,015 |
| 2007 | $383,500 | 26,845 | 38,712 |
| 2008 | $1,833,400 | 140,323 | 105,809 |
| 2009 | $1,382,700 | 121,963 | 104,699 |
| 2010 | $2,149,100 | 204,285 | 168,557 |
| 2011 | $2,384,200 | 198,726 | 175,619 |
Note: Quantity represents Number of pairs
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