Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Survey overview (n = 9,141).
| Start date | Last date | Samples |
| July 19, 2016 | July 30, 2016 | 1452 |
| October 31, 2016 | November 11, 2016 | 1036 |
| January 19, 2017 | January 30, 2017 | 957 |
| March 10, 2017 | March 21, 2017 | 1029 |
| May 23, 2017 | June 3, 2017 | 1008 |
| August 31, 2017 | September 11, 2017 | 1384 |
| November 30, 2017 | December 11, 2017 | 1236 |
| February 22, 2018 | March 5, 2018 | 1039 |
