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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,598,032 | 284,310 | 159,603 |
| 2006 | $18,204,709 | 1,491,124 | 1,818,195 |
| 2007 | $8,885,346 | 871,392 | 689,887 |
| 2008 | $21,044,943 | 1,976,403 | 1,533,827 |
| 2009 | $16,287,333 | 1,066,407 | 1,089,861 |
| 2010 | $27,822,546 | 1,930,870 | 1,696,045 |
| 2011 | $30,954,432 | 2,015,817 | 1,899,392 |
Note: Quantity represents Number of pairs
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