If option 1 or 2 in a18 estimate duration of the whole interview
Categories
Value
Category
0
5
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
30
32
35
36
37
40
45
50
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.