What is the smallest winner's share for the LPGA championship?
CREATE TABLE "wins_5" (
  "year" real,
  "championship" text,
  "winning_score" text,
  "to_par" text,
  "margin_of_victory" text,
  "runner_up" text,
  "winner_s_share" real
);
SELECT MIN("winner_s_share") FROM "wins_5" WHERE "championship"='lpga championship';