Survey Participation by All Licensees — In 2013 the total membership of the two professions was 45,021 and, with a total survey response rate total of 3296, the combined response rate of the two professions was 7.3 %, using the 2013 figures. (stopsop.ca)
In particular they examined survey response rates from the National Longitudinal Study of Youth (NLSY) given to students ages 13 to 17 in 1997. (jaypgreene.com)
The overall weekly employee survey response rates averaged 39 %, whereas for participants in the study, the Walkers, it was 68 %; for supervisors it averaged 41 %. (journals.plos.org)