How old were you when you first began smoking/sniffing on a regular basis?
Categories
Value
Category
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
34
35
36
37
38
39
40
42
43
45
47
49
50
51
53
54
55
56
57
58
59
60
61
62
65
70
75
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.