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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $10,981,020 | 1,165,760 | 1,989,590 |
| 2006 | $13,045,840 | 1,384,964 | 2,423,229 |
| 2007 | $20,271,325 | 0 | 3,058,886 |
| 2008 | $19,371,883 | 0 | 3,340,276 |
| 2009 | $14,267,976 | 0 | 2,884,129 |
| 2010 | $17,973,761 | 0 | 3,212,527 |
| 2011 | $24,530,396 | 1,456,939 | 3,911,814 |
Note: Quantity represents Number of pairs
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