What is the average value for events won by KCL in a year earlier than 2004?
CREATE TABLE "results" (
  "year" real,
  "date_held" text,
  "winner" text,
  "events_won_by_kcl" real,
  "events_won_by_kclms" real
);
SELECT AVG("events_won_by_kcl") FROM "results" WHERE "year"<2004;