What is the average Byes that has Ballarat FL of Sunbury against more than 1167?
CREATE TABLE "2009_ladder" (
  "ballarat_fl" text,
  "wins" real,
  "byes" real,
  "losses" real,
  "draws" real,
  "against" real
);
SELECT AVG("byes") FROM "2009_ladder" WHERE "ballarat_fl"='sunbury' AND "against">1167;