1977 March 26 1977 July 23 1977 August 6 1977 August 20 1977 August 27 1977 November 5 1978 January 7 1978 March 11 1978 March 18 1978 March 25 1978 December 9 1979 January 6 1979 January 27 1979 February 3 1979 April 7 1979 June 9 1980 January 12 1980 February 16 1980 March 8 1980 June 14 1981 January 3 1981 January 24 1981 February 14 1981 August 8 1981 October 24 1981 November 14 1982 July 3 1982 August 21 1982 October 30 1983 May 28 1983 July 9 1983 July 30 1983 October 8 1983 December 17 1984 February 4 1985 May 11 1986 February 22 1986 March 1 1986 September 13 1986 November 22 1986 November 29 1987 January 31 1987 February 7 1987 June 27 1987 September 19 1989 February 11 1989 February 18 1991 June 8 1991 July 13 1991 August 17 1992 September 26 1993 January 23 1994 February 26 1994 March 5 1995 May 20 1996 June 29 1998 May 2 1998 October 3 1998 October 10 1998 November 14 1999 May 1 2000 May 3 2000 November 3 2001 March 8 2001 March 23 2001 March 28 2002 April 18