s&p 500 monthly monthly returns for 1960
s&p 500 monthly monthly returns for 1961
s&p 500 monthly monthly returns for 1962
s&p 500 monthly monthly returns for 1963
s&p 500 monthly monthly returns for 19643
s&p 500 monthly monthly returns for 1964
s&p 500 monthly monthly returns for 1965
s&p 500 monthly monthly returns for 1966
s&p 500 monthly monthly returns for 1967
s&p 500 monthly monthly returns for 1968
s&p 500 monthly monthly returns for 1969
s&p 500 monthly monthly returns for 1970
s&p 500 monthly monthly returns for 1971
s&p 500 monthly monthly returns for 1972
s&p 500 monthly monthly returns for 1973
