1990
1981
1999
1978
1978
1978
1972
1976
1991
1977
1977
1977
1982
1991
1989
1989
1978
1978
1974
1979
1972
1984
1981
1979
1977
1981
1980
1976
1991
1991
2001
1978
1989
1989
1975
1988
1996
1976
1989
1990
1979
1973
1988
1993
1976
1979
1979
1967
1966
1979
1995
1984
1983
1982
1970
1985
1992
1993
1989
1989
1989
1978
1992
1979
1991
1974
1988
1992
1993
1990
1977
1977
1978
1974
1981
2001
1974
1992
1983
1983
1988
1972
1977
1973
1976
1969
1971
1975
1979
1969
1971
1977
1971
1965
1971
1977
1990
1970
1969
1979
1977
1971
1970
1970
1976
1968
1978
1985
1966
1979
1971
1978
1982
1984
1983
1978
1973
1967
1971
1983
1976
1976
1982
1977
1989
1978
1984
1969
1979
1979
1977
1967
1976
1979
1991
1969
1967
1978
1977
1981
1970
1975
1990
1976
1976
1971
1977
1977
1978
1975
1976
1977
Comments