Tabia ya Kuvuta Sigara ya Wanafunzi
kumi na tisa
26
24
21
23
24
23
20
27
20
22
20
25
22
21
23
21
21
22
21
20
21
22
21
29
25
23
21
21
23
22
23
20
22
22
25
21
kumi na tisa
21
23
20
21
miaka 23
24
23
22
23
kumi na tisa
21
26
28
21
21
28
20
25
23
20
20
24
23
20
23
21
23
20
21
22
24
1990
28
21
21
21
23
21
25
24
miaka 22
23
22
21
kumi na tisa
23
21
21
23
31
23