Issue #13 Dec 19, 1981 Issue #14 Nov 27, 1982 Issue #15 Dec 17, 1982 Issue #16 Nov 30, 1983 Issue #17 Dec 17, 1983 Issue #18 Jan 30, 1985 Issue #19 Feb 28, 1985 Issue #20 Oct 30, 1985 Issue #21 Feb 28, 1986 Issue #22 Aug 30, 1986 Issue #23 Jan 30, 1987 Issue #24 Jul 30, 1987 Issue #25 Feb 29, 1988 Issue #26 Sep 30, 1988 Issue #27 Mar 30, 1989 Issue #28 Oct 30, 1989 Issue #29 May 30, 1990 Issue #30 Nov 30, 1990 Issue #31 Sep 30, 1991 Issue #32 May 29, 1992