1979-09-20 1975-07-01 1977-04-07 1988-01-01 1997-10-31 1983-01-01 1981-02-27 1976-05-13 1978-07-21 1992-01-01 1981-04-17 1980-06-30 1961-11-30 1982-06-03 1957-10-09 1962-10-04 1982-10-01 2012-04-03 1981-02-05 1990-06-01 1976-07-29 1972-11-30 1980-05-29 1976-06-23 1998-07-16