1967
1977
1969
1986
1988
1970
1957
1965
1983
1968
1976
1976
1973
1975
1974
1975
1975
1974
1979
1971
1972
1973
1972
1973
1970
1972
1972
1961
1972
1967
1959
1990
1970
1971
1972
1972
1968
1977
1996
1987
1978
1986
1987
1973
1973
1977
1985
1973
1975
1972
1973
1974
1967
1982
1964
1975
1975
1978
1983
1981
1979
1983
1975
1975
1977
1978
1977
1977
1976
1976
1976
1973
1972
1987
1986
1982
1984
1983
1982
1987
1984
1984
1982
1984
1985
1986
1985
1985
1985
1985
1971
1969
1980
1981
1958
1989
1986
1979
1982
1995
1985
1970
1985
1984
1984
1990
1988
1983
1983
1972
1978
1977
1973
1961
1970
1984
1965
1978
1981
1992
1988
1972
1962
1974
1982
1984
1986
1970
1997
1975
1957
1978
1978
1974
2000
1991
1990
1996
1989
1977
1976
1976
1984
Comments