Table 1.

Achieved sample size and response rate for each time point

	N	Response rate (AAPOR RR2)
March 2017 (Pre-trip surveys of summer 2017 applicants)	6904	23%
Nov 2017 (Post-trip surveys of summer 2017 applicants)	4607	15%
Apr 2018 (Pre-trip surveys of summer 2018 applicants)	8206	31%
Nov 2018 (Post-trip surveys of summer 2018 applicants)	2995	13%
Apr 2019 (Pre-trip surveys of summer 2019 applicants)	6177	25%
Nov 2019 (Post-trip surveys of summer 2019 applicants and follow-up surveys of summer 2018 applicants)	5057	13%, 10%
Total	32,596

Achieved sample sizes and response rates include partial respondents. AAPOR RR2: American Association for Public Opinion Research Response Rate 2