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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,685,816 | 527,716 | 264,377 |
| 2006 | $7,008,131 | 1,562,778 | 502,681 |
| 2007 | $9,057,374 | 1,716,011 | 560,170 |
| 2008 | $15,862,849 | 2,311,520 | 1,008,531 |
| 2009 | $12,929,757 | 1,220,130 | 651,278 |
| 2010 | $9,156,220 | 910,469 | 506,322 |
| 2011 | $14,257,743 | 1,424,000 | 778,950 |
Note: Quantity represents Number of pairs
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