If option 1 or 2 in a18 estimate duration of the whole interview
Categories
Value
Category
0
1
2
3
4
5
6
7
8
9
10
11
15
17
20
21
22
23
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
43
45
46
47
48
49
50
52
53
54
55
56
57
58
59
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.