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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $119,045 | 45,905 | 43,352 |
| 2006 | $251,271 | 66,436 | 45,038 |
| 2007 | $191,996 | 0 | 45,548 |
| 2008 | $122,019 | 16,797 | 11,717 |
| 2009 | $93,934 | 3,772 | 8,802 |
| 2010 | $85,520 | 38,236 | 7,481 |
| 2011 | $230,194 | 27,689 | 24,025 |
Note: Quantity represents Number of pairs
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