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