| Year | 18-29 | 30-49 | 50-64 | 65 or older |
|---|---|---|---|---|
| 2005 | 12 | 8 | 5 | 2 |
| 2006 | 41 | 6 | 3 | 0 |
| 2008 | 63 | 27 | 9 | 2 |
| 2009 | 72 | 44 | 22 | 7 |
| 2010 | 78 | 53 | 33 | 11 |
| 2011 | 80 | 60 | 37 | 13 |
| 2012 | 83 | 67 | 43 | 19 |
| 2013 | 88 | 73 | 52 | 26 |
| 2014 | 84 | 77 | 52 | 27 |
| 2015 | 90 | 77 | 51 | 35 |
Source: Pew Research Center surveys, 2005-2006, 2008-2015. No data are available for 2007.
