MPAA: More Than Half Of All Movies In The Past 50 Years Have Been Rated “R”

The breakdown: Since 1968, the first year of the ratings classifications, there have been 17,202 movies rated R, 5,578 rated M/GP/PG, 4,913 rated PG-13 and 1,574 rated G. Just 524 movies have been rated X or NC-17, reflecting the reluctance of exhibitors to carry those titles.