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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $22,397,018 | 1,763,279 | 5,467,938 |
| 2006 | $26,802,356 | 2,110,103 | 4,263,749 |
| 2007 | $27,800,701 | 2,279,657 | 4,543,002 |
| 2008 | $31,334,991 | 2,079,379 | 5,601,787 |
| 2009 | $26,090,682 | 1,490,114 | 3,816,034 |
| 2010 | $31,817,773 | 1,774,836 | 4,646,780 |
| 2011 | $45,591,442 | 2,528,078 | 6,108,811 |
Note: Quantity represents Number of pairs
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