If you are an old like me, I don't think you can use current acceptance rates. They are artificially low compared to old rates because kids just send so many applications out now.

20 years ago UofM had a 50% acceptance rate, from some light google searching. Apparently they received 115k applications last year vs under 25k in 2005.

The biggest factor is that applying is a lot easier in the age of web applications, common application, and students being advised to send 10-15 applications out. In the 2000s even a good student might apply to 3-5 schools and feel they had covered enough.