What do you think are their reasons for not participating?
Categories
Value
Category
11
21
22
31
33
34
40
41
42
43
50
51
52
53
54
55
56
57
58
61
62
71
72
74
75
76
88
99
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.