In what years, when the conference record was 63-9, was the coach Walter Meanwell?
CREATE TABLE "coaching_history" (
  "coach" text,
  "years" text,
  "record" text,
  "conference_record" text,
  "overall_win_percentage" text
);
SELECT "years" FROM "coaching_history" WHERE "coach"='walter meanwell' AND "conference_record"='63-9';