Anybody know of a good service that tracks total annual US data breaches and number of victims? I know of the Identity Theft Resource Center and HaveIBeenPwned (which doesn't do comprehensive reports, afaik). But ideal would be comprehensive, authoritative historical data that goes back 20 years 

 @7d506386 I'd normally say threat intel firms, but 20 years back... is a lot.

Maybe Risk Based Security?

Cyber-insurers might have that data too.