Name the maximum enrollment for st. andrews university
CREATE TABLE "former_conference_members" (
  "institution" text,
  "location" text,
  "founded" real,
  "type" text,
  "enrollment" real,
  "nickname" text,
  "joined" text,
  "left" text,
  "current_conference" text
);
SELECT MAX("enrollment") FROM "former_conference_members" WHERE "institution"='St. Andrews University';