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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $136,206 | 19,942 | 28,834 |
| 2006 | $126,967 | 10,906 | 21,257 |
| 2007 | $216,295 | 19,713 | 10,627 |
| 2008 | $398,821 | 37,255 | 23,687 |
| 2009 | $456,368 | 42,716 | 14,717 |
| 2010 | $543,607 | 51,854 | 24,557 |
| 2011 | $559,271 | 60,703 | 36,941 |
Note: Quantity represents Number of pairs
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