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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $84,055,000 | 3,095,389 | 4,442,228 |
| 2006 | $95,186,000 | 3,483,715 | 5,030,490 |
| 2007 | $105,122,000 | 3,428,646 | 5,508,705 |
| 2008 | $122,054,000 | 3,482,956 | 5,361,770 |
| 2009 | $100,510,000 | 2,879,930 | 4,341,075 |
| 2010 | $114,545,037 | 3,694,142 | 4,271,263 |
| 2011 | $131,328,252 | 3,797,997 | 4,901,677 |
Note: Quantity represents Number of pairs
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