Questionnaire about mobile phones
16
20
one hundred quindecillion.
one hundred million
122222222222222225567665
18
21
19
22
17
18
24
18
18
18
19
15
25
17
17
16
26
17
18
16
17
16
15
16
16 and older
45
18
30
19
19
17 years old
13
8
15
18+
16
16
19
18
16
41
16
15
15
14
30
15
15
22
18
19
18
33
17
15
18
15
16
17
14
12
22
16
18
21
15 years old
17
17
16
15
34
16
18
16
16
17
16
16
54
21
22
15
70
17
29
15
22
15
16 years
18
16
20
19
15
21