What episode number has an audience share of 10%?
CREATE TABLE "viewing_figures" (
  "episode_number" real,
  "season" text,
  "original_airing" text,
  "total_viewers" text,
  "audience_share_average" text,
  "season_viewer_average" text
);
SELECT COUNT("episode_number") FROM "viewing_figures" WHERE "audience_share_average"='10%';