I ran a similar analysis a while back on 6 years of "Who Is Hiring" threads to show the growing demand for security engineers. If you're interested it's never been a better time to get into security: https://twitter.com/arkadiyt/status/892578518508253184

Is it just my perception, or is getting into security a bit of a pain? It seems like there's a lot of domain specific knowledge (I.e. stuff you won't know/remember coming straight out of a regular math/cs degree) and practicing/learning isn't necessarily free either (e.g. buying routers/switches/firewalls etc to set up a lab)

Glad to see this is getting compiled. I’m sure it’ll be of value to folks trying to decide what to learn if they want to work in startup companies.