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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $179,393,850 | 6,362,857 | 10,326,450 |
| 2006 | $190,981,251 | 6,189,651 | 9,881,548 |
| 2007 | $213,571,441 | 5,338,475 | 9,099,251 |
| 2008 | $217,225,264 | 5,027,198 | 8,662,368 |
| 2009 | $176,174,798 | 3,841,037 | 7,103,130 |
| 2010 | $168,221,720 | 3,465,874 | 6,534,707 |
| 2011 | $186,347,330 | 3,296,130 | 6,291,699 |
Note: Quantity represents Number of pairs
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