How many original Australian performers are there when the Original West End Performer is Jordan Dunne?
CREATE TABLE "characters_casts_and_recordings" (
  "character" text,
  "original_broadway_performer" text,
  "original_australian_performer" text,
  "original_west_end_performer" text,
  "2005_world_aids_day_benefit_dream_cast" text
);
SELECT COUNT("original_australian_performer") FROM "characters_casts_and_recordings" WHERE "original_west_end_performer"='Jordan Dunne';