I just had my 35th reunion and we had a memorial service for those who passed. The pattern is that you get a lot of deaths in the 20s and early 30s from reckless behavior (drinking, drugs, stupid risks) and depression (suicides, self destructive stuff), then there's a slow down in folks passing away, followed by a pick up in the late 50s and onward. Certainly seemed that way.
As far as I know my class is at one suicide, one car wreck.