What is the average cap number in scotland in 1986–1998 leass than 69?
CREATE TABLE "highest_goalscorers" (
  "name" text,
  "scotland_career" text,
  "caps" real,
  "goals" real,
  "average" real
);
SELECT COUNT("average") FROM "highest_goalscorers" WHERE "caps"<69 AND "scotland_career"='1986–1998';