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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $17,094,644 | 626,474 | 942,551 |
| 2006 | $14,282,009 | 775,686 | 838,541 |
| 2007 | $20,578,868 | 1,323,352 | 1,025,471 |
| 2008 | $26,583,070 | 925,061 | 1,828,715 |
| 2009 | $37,246,415 | 1,285,888 | 1,732,637 |
| 2010 | $36,716,707 | 1,544,919 | 2,474,811 |
| 2011 | $42,425,063 | 1,625,955 | 2,262,493 |
Note: Quantity represents Number of pairs
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