What year was Donkey Kong first released?
1981
1981
1981
1981
1981
1981
1981
1981
1981
1981
1981
1981
1981
1981
1981
1981
1981
1981
1981
1981
1981
1979
1983
1979
1983
1982
1979
1983
1982
1984
1979
1983
1982
1984
1979
1983
1982
1984
1979
1980
1983
1982
1984
1979
1980
1983
1982
1984
1979
1980
1983
1982
1984
1979
1980
1983
1982
1984
1979
1980
1983
1982
1984
1979
1980
1983
1982
1984
1979
1980
1983
1981.
1982
1984
1979
1980
1983
1982
1984
1985
1977
1979
1980
1983
1981.
1982
1984
1985
1977
1979
1980
1986
1983
1982
1984
1985
1977
1979
1980
1986
1983
1981.
1982
1984
1985
1977
1979
1980
1986
1983
1978
1982
1984
1981.
1985
1977
1979
1980
1986
1983
1978
1982
1984
1985
1977
1979
1980
1981.
1986
1983
1974
1978
1982
1984
1985
1977
1979
1980
1986
1983
1981.
1974
1978
1982
1984
1985
1981-82
1977
1981-80
1980
1986
1974
1978
1982
1984
1981.
1985
1977
1980
1987
1986
1981-82
1974
1978
1984
1985
1977
1981-80
1980
1981.
1987
1981-85
1981–80
1986
1974
1978
1985
1981-82
1977
1980
1987
1986
1981.
1974
1981-80
1978
1981-88
1985
1977
1980
1987
1986
1981-82
1974
1978
1981-85
1981.
1985
1977
1981-80
1987