Every 18 months or so, Web Accessibility IN Mind (WebAIM) runs a survey to assess current screen reader usage patterns and compare them to usage patterns in the past. This is extremely valuable data which influences the advice given by accessibility professionals.
Survey number 10 is currently running until 31 January, and as well as asking about screen reader choice and usage, it also asks whether you use a braille display.
We encourage you to take the survey
https://webaim.org/projects/screenreadersurvey10/