The chart for teachers shows elementary and secondary schools. I wouldn't be surprised to see that the proportion of teachers in colleges has increased, but I'd

The chart for teachers shows elementary and secondary schools. I wouldn't be surprised to see that the proportion of teachers in colleges has increased, but I'd need to know how much of the increase comes from adjuncts teaching a class or two per semester. Let me add that there were some very large class sizes during the peak of the baby boom. I don't think that I ever had fewer the fifty kids in my classes until I transferred out of parochial school in sixth grade. [edit: teach -> teaching]