Name the least year for evonne goolagong helen gourlay
CREATE TABLE "women_s_doubles_15_3_titles_5_runner_ups" (
  "outcome" text,
  "year" real,
  "championship" text,
  "surface" text,
  "partner" text,
  "opponents" text,
  "score" text
);
SELECT MIN("year") FROM "women_s_doubles_15_3_titles_5_runner_ups" WHERE "opponents"='Evonne Goolagong Helen Gourlay';