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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $41,654,351 | 3,940,809 | 2,172,009 |
| 2006 | $38,541,164 | 2,202,927 | 2,377,681 |
| 2007 | $35,922,162 | 2,262,733 | 2,069,785 |
| 2008 | $67,259,020 | 3,409,630 | 6,196,325 |
| 2009 | $128,047,343 | 6,420,542 | 13,365,858 |
| 2010 | $66,948,677 | 2,438,348 | 5,196,814 |
| 2011 | $31,470,196 | 1,161,227 | 1,484,798 |
Note: Quantity represents Number of pairs
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