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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,705,000 | 451,023 | 197,912 |
| 2006 | $1,805,000 | 474,302 | 209,520 |
| 2007 | $1,794,000 | 306,412 | 239,921 |
| 2008 | $1,891,000 | 286,678 | 205,268 |
| 2009 | $1,781,000 | 359,100 | 176,119 |
| 2010 | $2,903,000 | 560,593 | 277,301 |
| 2011 | $3,078,000 | 539,975 | 311,394 |
Note: Quantity represents Number of pairs
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