SUICIDE IN AUSTRALIA : A STATISTICAL ANALYSIS OF THE FACTS. 237 



Frequency of Suicide according to Age. Upper Curve, Males. 

 Lower Curve, Females. 

































































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Age. 



Explanation of Graph. — Each horizontal division denotes 5 years 

 of age, and each vertical division denotes 50 suicides per annum per 

 million of the population of the corresponding sex and age. The upper 

 rectangles denote the oh served frequency per annum per million males of 

 each quinquennial age-group, and the lower rectangles denote the observed 

 frequency per annum per million J emales of each quinquennial group. 

 The two curves denote the probable instantaneous values for any age 

 between the limits to 90, the upper being for the male sex, the lower 

 for the female sex, the ordinates thereto being per million per annum of 

 the corresponding sex. 



These tabulated results are better grasped when graphi- 

 cally exhibited. The curves in the preceding figure, based 

 upon the group-results in the table, shew the probable 

 instantaneous value at each age, the upper curve denoting 

 the frequency of male, and the lower the frequency of 

 female suicides. For males the frequency is seen to 

 increase almost linearly from 15 to 55 years of age. The 

 maximum frequency is about 62, after which the frequency 

 decreases decidedly, but not as quickly as it increases for 



