Well... that's an invitation to comment. So yes I confused "going to Uni" with "completing Uni", but I'm also thinking since 1980s to now, rather than a snapshot of just 2021. The % of USA population that has obtained at least a bachelor's degree hasn't changed much for a long time. Lots of people start 'college' but never finish. Table From wikipedia. I'm pretty sure those aren't exclusive categories, so basically 37% have at least a bachelor's degree, rather than 37% have no higher than a BD.
Here goes, my best effort to tally the Uni history of many relatives age 18-30, and one of best friend's kids... It's working out as about 50:50 of the young people I'm sure of, if they even started Uni. 6/16 who have completed a first degree, 37.5%. Familiar sort of statistic...
~22yo MT : nail technician, makes good money. No Uni
~29yo ED: never went to Uni, probably working
~24yo DH: didn't go to Uni. Not sure if he's working.
~28yo BW : didn't go to Uni ,is working
~23yo RB: no Uni, makes good money in sales
~25yo EB: no Uni, makes good money in sales
~24yo DB: joined army, I suspect Uni hopes after Army
~25yo HB: joined army, I suspect Uni hopes after Army
~20yo SH: started musical college of some sort
~21yo HB: completing a degree
~25yo AG: completed a Uni degree in STEM, probably working
~23yo JC: completed a business degree
~29yo PC: got Uni degree, 2 kids, speech therapist.
~24yo EB: degree + a master's (teacher)
20yo AM: at Ivy League doing STEM, will probably do postgrad things
~29yo KT: 99% sure she got a degree, not sure in what
Unclear
~18yo NS: not sure, working yes
~20yo D? : not sure, unlikely with her background
~22yo HB: not sure, unlikely with her background
~20yo NG: not sure, his brother graduated from Uni, though
~19yo AJ: not sure, unlikely with her background
~18yo LB: unclear but I'll be astonished if not headed to Uni
~18yo D?: his parents will much want him to go to Uni, but I suspect he'll refuse