When did Aerosmith form?
1970
1973
1973
1973
1973
1973
1973
1973
1973
1973
1973
1973
1972
1976
1973
1972
1976
1973
1972
1974
1976
1973
1972
1974
1976
1973
1972
1974
1976
1973
1972
1974
1976
1973
1972
1974
1976
1973
1972
1974
1976
1973
1972
1970
1974
1976
1973
1972
1970
1974
1979
1971
1976
1972
1977
1975
1970
1974
1979
1971
1976
1972
1977
1975
1970
1974
1979
1971
1976
1972
1977
1975
1970
1974
1979
1971
1976
1972
1977
1975
1970
1974
1979
1971
1976
1972
1977
1975
1970
1974
1979
1971
1976
1972
1977
1975
1970
1974
1979
1971
1976
1983
1982
1972
1977
1975
1970
1974
1978
1979
1971
1976
1983
1982
1972
1977
1975
1968
1970
1974
1978
1979
1971
1976
1983
1982
1972
1977
1975
1968
1970
1974
1978
1979
1971
1976
1980
1983
1982
1972
1977
1975
1968
1970
1974
1978
1979
1964
1971
1976
1973.
1980
1983
1982
1977
1975
1968
1970
1974
1978
1979
1964
1971
1980
1983
1982
1969
1977
1975
1968
1970
1974
1978
1979
1964
1971
1980
1983
1982
1969
1977
1975
1968
1970
1978
1979
1964
1971
1980
1983
1982
1969
1977
1975
1965
1968
1970
1978
1979
1964
1971