This is about the same percent that had a Bachelor degree in the early 1970s.
About 14% of Americans 25 and older hold a graduate or professional degree, or 31.4 million people.
Source: Which states are the most educated? – USAFacts
While 35% of adults over age 25 have at least a 4-year degree, if we look only at the younger cohort, such as 25-45, it is something like 42% have a 4-year degree now.
8.1% of my state’s residents lack a high school diploma or GED.
Long story but I do not have a high school diploma or a GED either. I do have a BS in computer science, an MS in software engineering, and a MBA. Go figure that out. I also had 5 knock out blows including a 5″ skull fracture and have been old I should not be particularly functional. Bewildering.