Which TV Station has Average Ratings of 16.89%?
CREATE TABLE "2005_fall_season" (
  "japanese_title" text,
  "romaji_title" text,
  "tv_station" text,
  "episodes" real,
  "average_ratings" text
);
SELECT "tv_station" FROM "2005_fall_season" WHERE "average_ratings"='16.89%';