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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $139,084 | 27,279 | 30,809 |
| 2006 | $219,257 | 31,038 | 23,901 |
| 2007 | $462,332 | 48,684 | 62,511 |
| 2008 | $848,166 | 45,887 | 50,459 |
| 2009 | $699,521 | 79,175 | 178,120 |
| 2010 | $1,115,365 | 335,953 | 1,139,892 |
| 2011 | $1,512,087 | 617,584 | 2,495,244 |
Note: Quantity represents Number of pairs
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