August 1989 October 1989 November 1989 December 1989 January 1990 February 1990 March 1990 April 1990 May 1990 June 1990August 1990 October 1990 November 1990 Nov. 1990 trip announcement December 1990 January 1991 February 1991 March 1991 April 1991 May 1991 June 1991 June 1991 trip announcementAugust 1991 September 1991 October 1991 November 1991 December 1991 January 1992 February 1992 March 1992 April 1992 May 1992 June 1992 July 1992August 1992 October 1992 November 1992 December 1992 January 1993 February 1993 March 1993 April 1993 May 1993 June 1993August 1993 October 1993 November 1993 December 1993 January 1994 February 1994 March 1994 April 1994 May/June 1994August 1994 October 1994 November 1994 December 1994 January 1995 February 1995 March 1995 April 1995 May 1995 June 1995
