Country &
date of
survey
Contractor
Coverage of
sample
% of sample listening regularly & projected
audience
Sample composition
JAPAN
Nippon
Research
13+ population
0.1%
SEX
%
Men
50
May 1988
Center
250,000 max.
Women
50
Limited
National
AGE
1.480
13-19
13
interviewed
20-29
15
30-49
44
50+
28
EDUCATION
Elementary 21
Senior High 58 Higher
21
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