What is the Winner's share in 2007?
CREATE TABLE "winners" (
  "year" text,
  "dates" text,
  "champion" text,
  "country" text,
  "score" text,
  "tournament_location" text,
  "purse" real,
  "winner_s_share" real
);
SELECT COUNT("winner_s_share") FROM "winners" WHERE "year"='2007';