1981-05-01 1980-09-01 1988-03-01 1987-01-01 1979-01-01 1975-01-01 1974-03-01 1987-08-07 1976-01-01 1989-01-01 1980-01-02 1982-03-01 1988-04-01 1984-12-01 1973-10-01 1980-09-11 1965-12-01 1977-01-02 1969-01-01 1982-01-01 1988-01-01 1986-11-01 1974-10-04 1974-04-01 1988-01-01 1982-04-01 1984-01-01 1984-02-01 1970-06-01 1975-03-01 1974-01-15 1971-04-01 1973-05-10 1988-01-15 1983-01-01