| Characteristic | 2012 | 2014 | 2016 | 2018 |
|---|---|---|---|---|
| - | - | - | - | - |
| - | - | - | - | - |
| - | - | - | - | - |
| - | - | - | - | - |
| - | - | - | - | - |
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Source
Release date
September 2018
Region
United States
Survey time period
March to June 2012, 2014, 2016, 2018
Number of respondents
17,236 respondents
Special properties
in all 50 states
Method of interview
Online survey
Supplementary notes
Original question: "Are you a member of your (check all that apply)...?"
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