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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $987,600 | 56,563 | 84,946 |
| 2006 | $1,404,000 | 78,675 | 142,541 |
| 2007 | $2,364,700 | 155,261 | 262,459 |
| 2008 | $1,557,700 | 81,712 | 104,991 |
| 2009 | $1,219,200 | 59,973 | 81,486 |
| 2010 | $1,202,900 | 72,045 | 88,562 |
| 2011 | $569,700 | 27,375 | 34,420 |
Note: Quantity represents Number of pairs
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