1960 5:06 hours
1965 5:29 hours
1970 5:56 hours
1975 6:07 hours
1980 6:36 hours
1985 7:07 hours
1990 6:55 hours
1992 7:04 hours
Source:
Nielson Media Research
|
1960 975
1965 969
1970 948
1975 910
1980 890
1985 906
1990 900
1992 899
Source:
The College Board
|
1960 16.1
1965 20.0
1970 36.4
1975 48.8
1980 59.7
1985 53.3
1990 73.2
1991 75.8
Source:
FBI
|
1954 22.5
1964 12.1
1974 5.5
1984 7.7
1988 8.5
1990 8.0
Source:
National Center for
Policy Analysis
|
1960 5.3%
1970 10.7%
1980 18.4%
1990 26.2%
Source:
National Center for
Health
Statistics
|
1960 3.5%
1965 4.5%
1970 8.5%
1975 11.8%
1980 11.5%
1985 11.2%
1990 11.9%
Source:
Bureau of the Census;
U.S.
House of Representatives
|
1960 8%
1970 11%
1980 18%
1990 22%
Source:Bureau of the Census;
Donald Hernandez,
The American Child
|
1960 3.6%
1965 4.0%
1970 5.9%
1975 7.6%
1980 8.5%
1985 10.0%
1990 11.3%
Source:Bureau of the Census;
U.S. House of Representatives
|