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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $65,163,939 | 2,778,712 | 5,488,819 |
| 2006 | $72,906,854 | 3,108,884 | 5,848,793 |
| 2007 | $69,420,632 | 2,367,896 | 4,393,322 |
| 2008 | $46,800,571 | 1,639,384 | 2,336,702 |
| 2009 | $32,775,051 | 1,053,990 | 2,220,035 |
| 2010 | $41,376,787 | 1,271,304 | 2,292,123 |
| 2011 | $37,827,322 | 1,114,451 | 1,825,055 |
Note: Quantity represents Number of pairs
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