Unfortunately, I don’t have any hard data to back up that claim, just extensive anecdotal evidence from roughly seven years interacting with professional philosophers and philosophy graduate students. And my anecdotal evidence skews heavily toward the US, so I’m not in a position to even hazard a guess about the prevalence of philosophy PhDs with STEM backgrounds in continental Europe. Sorry!
Unfortunately, I don’t have any hard data to back up that claim, just extensive anecdotal evidence from roughly seven years interacting with professional philosophers and philosophy graduate students. And my anecdotal evidence skews heavily toward the US, so I’m not in a position to even hazard a guess about the prevalence of philosophy PhDs with STEM backgrounds in continental Europe. Sorry!