1988-12-09 1985-09-06 1997-09-05 2004-03-16 1984-08-11 1986-01-01 1989-06-08 1989-09-08 1986-12-18 1988-04-01 1990-12-06 1989-07-16 1989-04-09 1981-02-20 2004-07-19 1989-01-01 1982-09-16 1981-05-22 1999-03-01 1999-01-01 1997-08-29 1997-06-01 1993-01-01