1977-12-15 1981-10-14 1981-04-03 1983-07-20 1988-07-01 1981-06-21 1983-12-22 1979-11-16 1981-01-01 1984-12-21 1983-02-17 1984-10-05 1976-12-20 1982-05-21 1980-03-21 1979-09-15 1994-02-18 1976-02-06 1989-07-03 1983-12-02 1978-04-21 1984-02-16 1982-01-01 1980-11-13 1980-10-02 1992-03-20 1987-02-01 1991-09-12 2008-06-19