How long have you had difficulty/been unable to do it?not at all?
Categories
Value
Category
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
32
33
34
35
36
37
38
39
40
42
43
44
45
46
47
48
49
50
51
52
54
58
60
63
64
66
69
70
84
87
Sysmiss
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.