1980 January 16
1980 January 29
1980 February 9
1980 March 11
1980 April 3
1980 April 22
1980 August 2
1980 September 3
1980 November 22
1980 November 27
1980 December 12
1981 January 27
1981 February 12
1981 April 5
1981 June
1981 June 27
1981 July
1981 August 13
1981 September 25
1982 January 22
1982 February 5
1982 March 22
1982 April
1982 May
1982 June 14
1982 June 15
1982 June 22
1982 July 4
1982 September 1
1982 October 4
1982 November 21
1983 February 8
1983 March 24
1983 June 8
1983 July 29
1983 December 10
1984 January 15
1984 February 1
1984 February 3
1984 February 27
1984 May 7
1984 May 23
1984 June 3
1984 June 25
1984 July
1984 July 8
1984 July 15
1984 August 5
1984 August 6
1984 August 16
1984 September
1984 September 4
1984 November 9
1984 December 5
1985 May 20
1985 May 28
1985 June 24
1985 December 6
1986 December 8
1986 December 29
1987 March 3
1987 June 27
1987 August 29
1987 October 15
1987 November 11
1988 January 13
1988 January 22
1988 February
1988 February 19
1988 March 3
1988 March 5
1988 March 19
1988 May 16
1988 June 8
1988 June 22
1988 July 8
1988 July 26
1988 August 18
1988 November 28
1988 December 1
1989 January 28
1989 March 16
1989 June 23
1989 December 21
1990 January 5
1990 May 7
1990 May 14
1990 November 10
1990 November 27
1990 November 30
1991 January 5
1991 January 23
1991 February 20
1991 March 5
1991 March 19
1991 September 4
1991 September 28
1992 January 18
undated
undated
undated
undated
undated
undated
undated