What was the total number of seats won where the % of votes is equal to 20.29?
CREATE TABLE "in_general_elections" (
  "year" text,
  "general_election" text,
  "seats_won" real,
  "change_in_seat" real,
  "pct_of_votes" text,
  "votes_swing" text
);
SELECT COUNT("seats_won") FROM "in_general_elections" WHERE "pct_of_votes"='20.29';