Respondents who have had sexual intercourse (MV525 <> 0).
Time since the last sexual relations as reported by the respondent. The first digit gives the units in which the respondent gave his answer: 1 - Days ago, 2 - Weeks ago, 3 - Months ago, 4 - Years ago,, with 9 meaning a special answer was given. The last two digits give the time in the units given. Any value for time greater than 90 is a special answer.