Letter Rate 20¢ Package Rate 20¢ Postcard Rate 13¢ Effective 11/1/1981 American President Ronald Reagan (1/20/1981-1/20/1989) Argentine President Raúl Alfonsín (12/10/1983-7/8/1989) Argentine President Reynaldo Bignone (7/1/1982-12/10/1983) Australian Prime Minister Bob Hawke (3/11/1983-12/20/1991) Austrian President Rudolf Kirchschläger (7/8/1974-7/8/1986) Bahamian Premier Lynden Pindling (5/10/1969-8/21/1992) Bahamian Prime Minister Lynden Pindling (5/10/1969-8/21/1992) Belgian Prime Minister Wilfried Martens (12/17/1981-3/7/1992) Brazilian President João Figueiredo (3/15/1979-3/14/1985) British Prime Minister Margaret Thatcher (5/4/1979-11/28/1990) Canadian Prime Minister Pierre Trudeau (3/3/1980-6/29/1984) East German Chairman of the State Council Erich Honecker (10/29/1976-10/18/1989) German President Karl Carstens (7/1/1979-6/30/1984) Japanese Prime Minister Yasuhiro Nakasone (11/27/1982-11/6/1987)