s&p 500 monthly monthly returns for 1971
s&p 500 monthly monthly returns for 1972
s&p 500 monthly monthly returns for 1973
s&p 500 monthly monthly returns for 1975
s&p 500 monthly monthly returns for 1976
s&p 500 monthly monthly returns for 1980
s&p 500 monthly monthly returns for 1981
s&p 500 monthly monthly returns for 1982
s&p 500 monthly monthly returns for 1983
s&p 500 monthly monthly returns for 1984
s&p 500 monthly monthly returns for 1985
s&p 500 monthly monthly returns for 1986
s&p 500 monthly monthly returns for 1987
s&p 500 monthly monthly returns for 1988
s&p 500 monthly monthly returns for 1992
