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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $167,514,278 | 7,344,442 | 10,696,953 |
| 2006 | $187,448,032 | 17,451,851 | 8,383,126 |
| 2007 | $233,054,567 | 12,904,294 | 8,684,480 |
| 2008 | $317,237,482 | 13,914,369 | 11,072,817 |
| 2009 | $292,269,805 | 10,470,624 | 8,424,751 |
| 2010 | $227,448,242 | 7,058,467 | 10,180,888 |
| 2011 | $164,671,754 | 4,847,972 | 7,562,748 |
Note: Quantity represents Number of pairs
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