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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $25,272,458 | 275,605 | 674,449 |
| 2006 | $29,901,259 | 974,125 | 749,348 |
| 2007 | $35,908,462 | 948,303 | 750,630 |
| 2008 | $40,191,165 | 949,595 | 781,194 |
| 2009 | $42,230,580 | 1,023,633 | 805,320 |
| 2010 | $41,473,865 | 1,080,251 | 807,692 |
| 2011 | $45,608,576 | 1,213,472 | 801,656 |
Note: Quantity represents Number of pairs
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