Fig. 3

Temporal variations in suicides and temperatures. The values are shown between 1751 and 1990 using 30-year means with 10-year step. The associations between suicide rates and temperature were quantified using Pearson correlations (r) and the statistical significance (P) of each correlation. The calendar year indicates the last year of the 30-year period. The significance was generated using a Monte Carlo method [27] with a number of 1,000,000 surrogate series