In what year was Sonic the Hedgehog released?
1991
1987
1988
1987
1988
1991
1987
1988
1991
1990
1986
1993
1984
1987
1988
1991
1990
1985
1986
1982
1993
1984
1992
1987
1988
1989
1991
1990
1985
1986
1982
1993
1984
1992
1987
1988
1989
1991
1990
1985
1986
1982
1983
1993
1984
1992
1987
1988
1989
1991
1990
1985
1986
1982
1983
1993
1984
1992
1987
1994
1988
1989
1991
1990
1985
1986
1982
1983
1993
1984
1992
1987
1994
1988
1989
1996
1991
1990
1985
1986
1982
1983
1993
1984
1992
1987
1994
1988
1989
1996
1991
1990
1985
1986
1982
1983
1993
1984
1992
1987
1994
1988
1989
1996
1991
1995
1990
1985
1986
1982
1983
1993
1984
1992
1987
1994
1988
1989
1996
1991
1995
1990
1985
1986
1982
1983
1993
1981
1980
1984
1992
1987
1994
1988
1989
1996
1991
1995
1990
1985
1986
1982
1983
1993
1981
1980
1984
1992
1987
1994
1988
1989
1996
1991
1995
1990
1985
1986
1982
1983
1993
1981
1980
1984
1992
1987
1994
1988
1989
1996
1991
1995
1990
1985
1986
1982
1983
1993
1981
1980
1984
1992
1987
1994
1988
1989
1996
1991
1995
1990
1985
1986
1982
1983
1993
1981
1980
1984
1992
1987
1994