How many figures for votes Khuzestan were there when the percentage was 34.50?
CREATE TABLE "table1_1827900_1" (
  "candidates" text,
  "votes_khuzestan" real,
  "pct_of_votes_khuzestan" text,
  "votes_nationally" real,
  "pct_of_votes_nationally" text
);
SELECT COUNT("votes_khuzestan") FROM "table1_1827900_1" WHERE "pct_of_votes_khuzestan"='34.50';