1971
1991
1981
1997
1983
1995
1997
1981
1988
1984
1975
1981
1985
1979
1974
1982
1985
1986
1974
1980
1984
1983
1997
1984
1980
1974
1980
1983
1977
1986
1971
1985
1983
1987
1985
1994
2005
2003
1992
1978
1982
1984
1993
1993
1990
1994
1987
1978
1993
1993
1984
1987
1990
1974
1996
1993
1965
1986
1974
1993
1972
1988
1974
1991
1993
1985
1985
1994
1985
1989
1972
1968
1986
1976
1988
1987
1990
1979
1978
1990
1981
1978
1981
1988
1991
1981
1998
1986
1991
1988
2000
1989
1994
1971
1975
1973
1988
1974
1986
1975
1990
1997
1988
1984
1973
1999
1999
1987
1986
1981
1983
1982
1992
1992
1984
1981
1995
1972
1982
1985
1963
1989
1983
1986
1972
1993
1975
1995
1998
1977
1976
1979
1997
1999
1971
1970
1981
1993
1975
1992
1989
1989
1988
1985
1997
1988
1985
1976
1989
1989
1984
1972
1972
1973
1983
1978
1990
1993
1982
1978
1982
1984
1992
1980
1984
1976
1988
1986
1995
1979
1995
1999
1979
1988
1984
1972
1965
1978
Comments