When was the band Tom Petty and The Heartbreakers formed?
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1977
1977
1977
1977
1977
1983
1977
1983
1980
1973
1977
1983
1980
1973
1977
1975
1983
1979
1984
1980
1973
1977
1975
1983
1979
1984
1980
1973
1977
1975
1983
1979
1984
1980
1973
1977
1975
1983
1979
1984
1980
1973
1981
1977
1976.
1975
1983
1979
1984
1980
1973
1981
1977
1975
1983
1979
1984
1980
1973
1981
1977
1975
1983
1979
1984
1980
1973
1981
1977
1975
1983
1979
1984
1980
1973
1981
1977
1975
1983
1979
1984
1980
1973
1981
1976.
1977
1975
1983
1979
1984
1982
1980
1973
1981
1977
1975
1983
1979
1984
1982
1980
1973
1981
1977
1975
1983
1979
1984
1982
1980
1973
1981
1977
1975
1983
1979
1984
1982
1980
1973
1981
1976.
1991
1974
1975
1983
1978
1979
1984
1982
1980
1973
1981
1992
1991
1974
1975
1983
1985
1978
1979
1984
1982
1980
1973
1981
1992
1991
1974
1975
1983
1985
1978
1979
1984
1982
1980
1973
1981
1992
1991
1974
1976.
1975
1983
1985
1978
1979
1984
1982
1980
1971
1987
1973
1981
1992
1991
1974
1977.
1975