If option 1 or 2 in a18 estimate duration of the whole interview
Categories
Value
Category
0
1
3
5
7
8
10
11
13
15
20
25
30
31
33
35
37
38
40
42
43
44
45
47
48
50
52
55
56
58
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.