27 Sep 1999 General Assembly - Thirteenth session - Santiago - Chile

17 Oct 1995 General Assembly - Eleventh session - Cairo - Egypt

04 Oct 1993 General Assembly - Tenth session - Bali - Indonesia

30 Sep 1991 General Assembly - Ninth session - Buenos Aires - Argentina

22 Sep 1987 General Assembly - Seventh session - Madrid - Spain

14 Sep 1981 General Assembly - Fourth session - Rome - Italy