What is the year of the movie with an opening day on Friday with a rank 10?
CREATE TABLE "biggest_opening_day_gross" (
  "rank" real,
  "movie" text,
  "year" real,
  "studio_s" text,
  "opening_day_net_gross" real,
  "day_of_week" text
);
SELECT COUNT("year") FROM "biggest_opening_day_gross" WHERE "day_of_week"='friday' AND "rank"=10;