1978-05-17 1975-01-17 1973-09-14 1975-06-26 1976-03-09 1976-02-19 1976-12-23 1977-09-16 1977-04-01 1977-01-07 1977-11-09 1978-01-01 1978-04-20 1979-04-11 1980-12-19 1980-08-09 1981-09-11 1981-02-12 1981-07-24 1981-05-14 1981-04-25 1982-08-30 1983-12-21 1983-05-18 1983-03-30 1990-02-22