How many percentages are listed for the election in 1983?
CREATE TABLE "election_results" (
  "election" real,
  "candidates_fielded" real,
  "num_of_seats_won" real,
  "total_votes" real,
  "pct_of_popular_vote" text,
  "place" text
);
SELECT COUNT("pct_of_popular_vote") FROM "election_results" WHERE "election"=1983;