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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $109,230,000 | 3,145,544 | 1,365,082 |
| 2006 | $123,163,000 | 3,837,849 | 1,539,207 |
| 2007 | $80,325,000 | 2,417,883 | 767,202 |
| 2008 | $69,554,000 | 1,939,651 | 570,254 |
| 2009 | $80,844,000 | 2,303,799 | 645,112 |
| 2010 | $90,725,126 | 2,822,124 | 739,209 |
| 2011 | $106,246,810 | 3,261,200 | 881,622 |
Note: Quantity represents Number of pairs
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