How many family friendly games are in the 1990s?
CREATE TABLE "european_version" (
  "song_title" text,
  "artist" text,
  "language" text,
  "decade" text,
  "genre" text,
  "exportable" text,
  "family_friendly" text
);
SELECT COUNT("family_friendly") FROM "european_version" WHERE "decade"='1990s';