Response options: Missing; RU: Inappropriate response{Inappropriate}, Not asked in survey, Not applicable ('Have not done'){Not applicable}, No answer, Don´t know, Not at all, Once, Twice, Three times, More than three times
Response options: Every day, More than once a week, Once a week, Once or twice a month, A few times a year, Less often than that or, Never, [DO NOT READ] Don’t know, [DO NOT READ] Refused
