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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $63,532 | 35,338 | 6,345 |
| 2006 | $51,589 | 47,559 | 36,199 |
| 2007 | $61,110 | 37,634 | 4,745 |
| 2008 | $23,601 | 20,582 | 1,720 |
| 2009 | $34,623 | 23,386 | 2,317 |
| 2010 | $31,810 | 46,106 | 1,939 |
| 2011 | $46,322 | 40,553 | 2,842 |
Note: Quantity represents Number of pairs
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