So, a lot hinges on definitions and whether you are using the liberal definition of fascism (exactly the platform, priorities, and theories of the NSDAP, nevermind Spain, Portugal, Italy, Japan etc) or the anarchist definition of fascism (any right wing authoritarianism)

For this market, socialist dictatorship counts as a fashist one.

Should be much lower than this market (since 2050 is not only less than half the time away, but also not all dictatorships are "fascist"):