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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,924,176 | 201,233 | 40,754 |
| 2006 | $5,136,036 | 177,752 | 38,554 |
| 2007 | $4,956,806 | 152,072 | 37,857 |
| 2008 | $5,775,085 | 160,407 | 42,009 |
| 2009 | $5,501,210 | 144,020 | 39,476 |
| 2010 | $5,730,630 | 152,584 | 46,465 |
| 2011 | $6,190,572 | 154,422 | 43,606 |
Note: Quantity represents Number of pairs
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