0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
niu (not in universe)
18
19
male
female
spouse present
unmarried partner present
no spouse or unmarried partner present
no
yes
blank
5 or more days a week
3 to 4 days a week
1 to 2 days a week
at least once a week
once every 2 weeks
once a month
less than once a month