This histogram presents the relative number of families having a given number of children. For example, about 15% of the families have 2 children. The mean is about 1.78 children per family.
This histogram shows the relative number of people, males and females, having had a given life span. The numbers on the X axis represent the centers of the classes, for example 35 is the center of the class whose boundaries are 30 and 40 years. The means are 56.1 years for the males and 53.9 years for the females.
Distribution of the events during the year
This histogram shows the relative number of events (birth, marriage, death) as a function of the month. For example, about 24% of the marriage have occured during the month of january.