根据下面资料，回答题
Crime has its own cycles,a magazine reported some years ago． Police records that were studied for five years from over 2400 cities and towns show a surprising link between chan-ges in the season and crime patterns in UK．
The pattern of crime has varied very little over a long period of years． Murder reaches its high during July and August, as do rape and other violent attacks． Murder, moreover, is more than seasonal:it is a weekend crime． It is also a nighttime crime：62 percent of mur-ders are． committed between 6 p．m． and 6 a． m．
Unlike the summer high in crimes of bodily harm, burglary has a different cycle． You are most likely to be robbed between 6 p．m． and 2 a．m． on a Saturday night in December,January or February． The most uncriminal month of all is May; however, more dog bites are reported in this month than in any other month of the year．
On the one hand, our intellectual seasonal cycles are completely different from our crim-inal tendencies． Professor Huntington, of the Foundation for the Study of Cycles, made extensive studies to discover the seasons when people read serious books, attend scientific meetings, make the highest scores on examinations, and propose the most changes to patents． In all instances,he found a spring peak and an autumn peak separated by a summer low． On the other hand, Professor Huntington´s studies indicated that June is the peak month for suicides and admissions to mental hospitals． June is also a peak month for marria-ges !
 The seasonal cycle of crime patterns is proved by__________．