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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $178,671,370 | 32,237,230 | 26,215,337 |
| 2006 | $176,600,780 | 28,195,954 | 23,350,062 |
| 2007 | $205,619,187 | 39,883,189 | 33,818,256 |
| 2008 | $298,807,277 | 55,933,343 | 51,191,078 |
| 2009 | $267,134,378 | 45,577,537 | 43,947,169 |
| 2010 | $405,684,196 | 65,217,330 | 64,787,015 |
| 2011 | $426,501,563 | 60,968,537 | 27,149,575 |
Note: Quantity represents Number of pairs
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