List the highest number of students in attendance for the institution that started in 1923.
CREATE TABLE "division_i" (
  "institution" text,
  "location" text,
  "founded" real,
  "affiliation" text,
  "enrollment" real,
  "team_nickname" text,
  "primary_conference" text
);
SELECT MAX("enrollment") FROM "division_i" WHERE "founded"=1923;