These indices are probably not meaningful. It’s easy to find news stories of ordinary people in England and Germany being arrested for their opinions or even for mocking elected officials.
German criminal law actually adds special penalties for “defaming” politicians (Defamation of persons in the political arena, Section 188, German Criminal Code) as part of a dozen free-speech limitations that would violate the First Amendment here. And truth isn’t an ironclad defense the way it is here.
In England, content that’s merely “grossly offensive” or “menacing” is illegal under their Communications Act 2003, and similar laws date back earlier.
There are multiple cases even in the last few months alone of these laws being used vigorously in both countries (e.g. this case in England in which someone was jailed for insulting a politician)
In contrast, in America since Brandenburg v. Ohio (1969), speech is criminal only when it is (a) intended, and (b) likely to produce imminent lawless action, or when it is a true threat, obscenity, or narrow category such as child‑pornography.
Regarding the Russians and East Slavs more broadly, Anatoly Karlin has some napkin math that at the very least shows the huge toll that the world wars had on their populations, which barely grow or s: