1968-8	1968-9	1968-10	1969-11	1969-12	1969-13
1969-14	1970-15	1970-16	1970-17	1971-18	1971-19
1971-20	1972-21	1972-22	1972-23	1972-24	1973-25
1973-27	1973-28	1974-29	1974-30	1975-1	1975-2
1975-3	1975-4