| Quality assurances | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 |
|---|---|---|---|---|---|---|
| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
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Source
Release date
April 2022
Region
United States
Survey time period
2017 to 2022
Number of respondents
291 respondents
Method of interview
Email survey
Supplementary notes
Values prior to 2021 were taken from previous surveys.
2017 base: 272 respondents
2018 base: 417 respondents
2019 base: 340 respondents
2020 base: 340 respondents
Multiple answers were possible.
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