Surprisingly tricky to prove. It looks like Berkeley overhauled its student body statistics about 15 years ago, and data from before seems to have vanished.

Is it argument from authority if I cite Karp?

https://www2.eecs.berkeley.edu/bears/CS_Anniversary/karp-tal...

The two undergraduate degree programs at Berkeley seem to date from 1968 or so. (Karp is fuzzy about his citations).

It was certainly well established when I went there in the early 80's.