2087-present
Jan-Mar 87
Apr-Jun 87
Sep-Nov 87
Dec 87
Jan-Mar 88
Apr-Jun 88
Jul-Sep 88
Oct-Dec 88
Jan-Mar 89
Apr-Jun 89
Jul-Sep 89
Oct-Dec 89
Jan-Mar 90
Apr-Jun 90
Jul-Sep 90
Oct-Nov 90
Nov-Dec 90
Jan-Mar 91
Apr-Jun 91
Jul-Sep 91
Oct-Dec 91
Jan 92-Mar 92
Apr 92-Jun 92