| Characteristic | Yes | No | Don't know |
|---|---|---|---|
| - | - | - | - |
| - | - | - | - |
| - | - | - | - |
| - | - | - | - |
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Source
Release date
December 2011
Region
United States
Survey time period
February 2006 to December 2011*
Number of respondents
1,211 respondents
Age group
18 years and older
Method of interview
Telephone interview
Supplementary notes
* December 7, 2011 to December 11, 2011
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