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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $225,656 | 17,578 | 17,471 |
| 2006 | $538,661 | 65,498 | 107,457 |
| 2007 | $915,239 | 66,117 | 100,195 |
| 2008 | $613,130 | 34,901 | 50,482 |
| 2009 | $363,939 | 15,251 | 24,145 |
| 2010 | $347,003 | 26,415 | 44,571 |
| 2011 | $294,428 | 6,875 | 14,411 |
Note: Quantity represents Number of pairs
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