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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,052,000 | 1,015,001 | 442,653 |
| 2006 | $5,337,000 | 433,162 | 467,625 |
| 2007 | $7,821,000 | 548,908 | 673,949 |
| 2008 | $10,901,000 | 782,377 | 802,290 |
| 2009 | $8,342,000 | 450,162 | 546,018 |
| 2010 | $8,583,000 | 477,467 | 561,611 |
| 2011 | $14,544,000 | 1,479,303 | 925,819 |
Note: Quantity represents Number of pairs
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