1975-01-08 1997-03-14 1975-12-30 1974-03-01 1978-12-01 1989-01-01 1991-01-01 1990-01-26 1975-02-11 1983-01-01 1971-01-01 1987-01-01 1975-03-01 1979-01-01 1972-02-01 1972-04-01 1972-01-01 1976-06-01 1986-01-01 1973-10-01 1979-12-01 1976-09-01 1977-02-01 1977-01-02 1973-01-01 1979-04-01 1974-11-01 1972-11-01 1991-02-22 1988-01-01 1976-05-01 1981-04-01 1974-10-04 1975-04-15 1971-01-02