1988
1977
1982
1978
1985
1982
1978
1981
1981
1983
1984
1982
1981
1980
1977
1982
1987
1987
1987
1987
1982
1981
1989
1978
1982
1984
1983
1984
1981
1981
1979
1981
1977
1990
1986
1981
1981
1982
1976
1984
1990
1981
1983
1981
1979
1970
1977
1984
1987
1987
1986
1979
1979
1980
1986
1987
1979
1980
1979
1979
Comments