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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,019,620 | 148,406 | 151,564 |
| 2006 | $1,259,464 | 71,988 | 83,370 |
| 2007 | $1,591,215 | 134,932 | 99,696 |
| 2008 | $2,268,723 | 43,515 | 64,068 |
| 2009 | $1,098,685 | 34,825 | 57,224 |
| 2010 | $732,536 | 15,195 | 24,367 |
| 2011 | $945,988 | 24,557 | 31,630 |
Note: Quantity represents Number of pairs
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