Maybe only 15%.
This is really interesting. I've written at length that you don't even need to graduate from High School to get a job in tech (yeah, yeah - it's better if you do). Instead of expensive college, (free) self-study towards a Cisco CCNA certification will open the doors to a $40k + entry level networking job. Add in a CCIE certification and ASA Firewall/IPS specialization and you're looking at six figures.
All without a degree.
But most other jobs don't really require a sheepskin, either. The implication, then, is that the higher education lobby/interest group will continue to push "free college" and laws that mandate degrees (I hadn't known until I read the link above that Washington DC just passed a law saying you can't be a child care worker if you haven't graduated from college; this simply boggles the mind, and is right up there with the 100 hours of training and licensing to braid hair).
But as more people realize that a college degree has been devalued over the last 30 years, we can expect to see more of these laws as campus bureaucrats try increasingly desperately to use the law to extract money from lower income people.
The discussion of the hypocrisy of people who proudly claim to be lefties using the law to screw over the poor is best summed up here.