year,P/E
1970,15.5
1971,18.5
1972,18.2
1973,14.0
1974,8.6
1975,10.9
1976,11.2
1977,9.3
1978,8.3
1979,7.4
1980,7.9
1981,8.4
1982,8.6
1983,12.5
1984,10.0
1985,12.3
1986,16.4