What is the lowest Winner's share (¥) in 2011?
CREATE TABLE "winners" (
  "year" real,
  "dates" text,
  "champion" text,
  "country" text,
  "score" text,
  "purse" real,
  "winner_s_share" real
);
SELECT MIN("winner_s_share") FROM "winners" WHERE "year"=2011;