How many different final scores were there in 1963?
CREATE TABLE "men_s_doubles_16_10_titles_6_runner_ups" (
  "outcome" text,
  "year" real,
  "championship" text,
  "surface" text,
  "partner" text,
  "opponents_in_the_final" text,
  "score_in_the_final" text
);
SELECT COUNT("score_in_the_final") FROM "men_s_doubles_16_10_titles_6_runner_ups" WHERE "year"=1963;