When was the first Captain Underpants published?
1997
1997
1997
1997
1997
1997
1997
1997
1997
1997
1997
1997
1979
1996
1997
1979
1996
1997
1979
1991
1996
1997
1979
1991
1996
1997
1979
1993
1991
1996
1997
1979
1993
2000
1991
1996
1999
1997
1990
1979
1989
1993
2000
1991
1996
1999
1997
1990
1979
2001
1989
1993
2000
1991
1996
1999
1997
1990
1979
2001
1989
1993
2000
1991
1996
1977
1999
1997
1990
1979
2001
1989
1969
1993
2000
1987
1991
1996
1977
1999
1990
1979
2001
1989
1995
1969
1993
2000
1987
1991
1996
1992
1977
1999
1990
1979
2001
1989
1995
1969
1993
2000
1987
1991
1996
1992
1977
1999
1984
1990
1979
2001
1989
1995
1969
1998
1993
2000
1987
1991
1996
1992
1977
1999
1984
1990
1979
2001
1989
1995
1969
1998
1993
2000
1988
1987
1991
1996
1992
1977
1999
1984
1990
1979
2001
1989
1995
1969
1998
1993
2000
1985
1988
1987
1991
1996
1992
1977
1999
1984
1990
1979
2001
1989
1995
1969
1998
1993
2000
1985
1988
1983
1987
1991
1996
1992
1977
1999
1984
1990
1979
2001
1989
1995
1969
1998
1997.
1993
2000
1985
1988
1991.
1997.
1993.
1989.
1979.
2000.
1996.
1997.
June 1997
1999.