how many times was the qualifying score 60.750?
CREATE TABLE "2008_season" (
  "year" real,
  "competition" text,
  "location" text,
  "event" text,
  "final_rank" text,
  "final_score" text,
  "qualifying_rank" real,
  "qualifying_score" text
);
SELECT COUNT("event") FROM "2008_season" WHERE "qualifying_score"='60.750';