From the gragh,we can be informed that the number of car accidents in Walton city fluctuated in the year of 1990.The number was ascending from 22 in Jau to 32 in Mar but falling from 32 in Mar to 26 in June,and after June,the rate was rising sharply and reached the peak of 39 at Aug.But after Aug,the rate wae decling gradually and finally to the 16 at the end of the year.

There are many reasons for this phenomenon,but in general,they come down to two reasons as follows.To begin with, with the development of traffic system,there are more and more traffic signs have been set up on the road to alert drivers to drive carefully,under this circunstance,traffic accidents are less liable to happen.In additon,new law has been put into effect,if you dont‘t obey this law,you will be punished more severe than past.Aware of this,more and more people are forced to conform to this law.

To sum up, from the declined number in the graph,we could predict that less and less traffic accidents will hanppen in the Walton city.