How many superman versions have there been in DC???

I was wondering how many incarnations of superman there have been.
(superman prime, superman red/blue and regular post-crisis supes count as one, as they are the same charachter).

The ones I can remember are:

CLARK:
Pre-Crisis Earth 1
Pre-Crisis Earth 2
Pre-Crisis Earth 3 (ultraman)
Post-Crisis (SUPERMAN, prime, red, blue)
Post-Cirsis Antimatter (ultraman)

WANNABEE's:
eradicator
superboy (Precrisis)
superboy (postcrisis)
bizzaro
835th centuary
800th centuary
hyperman
Superman Robots
2956
2965

Also, I read before that there were over 30 different charachters, all of whom were supergirl at one time or another

1939

1942

1953

1960 silver

1971

wasnt there a Superman who was 3 times stronger?..and had a half green face?..called composition superman or something?

All those in the above pics were the same charachter. I meant how many different Kal-El / Clark kent charachters have appeared in DC.

I know there have been over 30 DIFFERENT supergirls