Issue #38 Jun 30, 1988 Issue #39 Feb 28, 1989 Issue #40 Jun 30, 1989 Issue #41 Sep 30, 1989 Issue #42 Jan 30, 1990 Issue #43 May 30, 1990 Issue #44 Sep 29, 1990 Issue #45 Dec 19, 1990 Issue #46 Jun 29, 1991 Issue #47 Feb 29, 1992 Issue #48 Aug 29, 1992 Issue #49 Feb 27, 1993 Issue #50 Jul 30, 1993 Issue #51 Jan 29, 1994 Issue #52 Jun 30, 1994 Issue #53 Mar 30, 1995 Issue #54 Oct 30, 1995 Issue #55 May 30, 1996 Issue #56 Oct 30, 1996 Issue #57 May 30, 1997