1972
1973
1973
1980
1980
1976
1976
1974
1972
1975
1976
1976
1976
1976
1975
1977
1977
1975
1985
1982
1968
1973
1969
1983
1975
1975
1975
1975
1967
1967
1984
1969
1969
1966
1974
1978
1975
1973
1968
1983
1984
1984
1984
1985
1985
1984
1983
1983
1983
1983
1983
1984
1977
1986
1980
1966
1967
1961
1976
1972
1977
1982
1982
1984
1985
1969
1969
1970
1986
1982
1987
1968
1975
1966
1968
1970
1970
1976
1973
1980
1980
1970
1978
1978
1972
1965
1966
1975
1973
1969
1967
1981
1975
1974
1970
1970
1975
1973
1973
1970
1964
1974
1973
1972
1973
1984
1984
1968
1964
1988
1972
1967
1981
1974
1970
1977
1974
1982
1982
1981
1975
1971
1965
1974
1978
1986
1966
1977
1961
1983
1984
1981
1983
1984
1983
1983
1983
1985
1986
1987
1986
1986
1985
1986
1986
1985
1975
1972
1971
1973
1970
1972
1972
1967
1973
1976
1972
1971
1971
1976
1965
1967
1978
1976
1974
1962
1965
1982
1969
1968
1964
1971
1973
1982
1967
1984
1964
1966
1978
1974
1977
1970
1970
1965
1973
1972
1971
1972
1972
1971
1972
1972
1973
1972
1972
1972
1971
Comments