Issue #0 Sep 30, 1998 Issue #1 Apr 30, 1997 Issue #-1 Jul 10, 1997 Issue #2 May 31, 1997 Issue #3 Jun 30, 1997 Issue #4 Jul 31, 1997 Issue #5 Jun 18, 1997 Issue #6 Jul 10, 1997 Issue #7 Aug 27, 1997 Issue #8 Sep 17, 1997 Issue #9 Oct 15, 1997 Issue #10 Nov 19, 1997 Issue #11 Dec 17, 1997 Issue #12 Jan 14, 1998 Issue #13 Apr 30, 1998 Issue #14 Mar 18, 1998 Issue #15 Apr 15, 1998 Issue #16 Jul 31, 1998 Issue #17 Aug 31, 1998 Issue #18 Jul 15, 1998