| 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | |
| Ages 19-25 | 36.9% | 35.1% | 34.3% | 34.2% | 31.2% | 30.5% |
| Ages 26-34 | 36.7% | 35.0% | 34.5% | 34.5% | 34.3% | 33.9% |
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