Well according to his IMDB page he has had 175 acting credits (film tv and vid games).
From his start in together for days (1972) up through Goodfellas (1990), he's had 13 films, and 9 tv movies/series. Of those 13 films, only 2 were PG, the other 11 were all R rated.
From 1990 through 1995 (not inc goodfellas), he had 24 films 6 of which were either pg or pg-13. Strictly businesss, loaded weapon, jurassic park, fluke, hail caesar and amos & andrew.
From 1996 to 2000, i see 17 films.. 4 of which were PG (or as one was rated, TV-G). Starwars ep 1, unbreakable, Our friend martin and Sphere.
That's not that a lot of non R movies in comparison. Barely 25%..
ANd in most of his R works, he seems to love dropping the F-bomb or the Mffer bomb.
SOME of those films, there's MORE F-bombs than dead bodies!!?!