What is the Height that has a year born before 1977
CREATE TABLE "fiba_euro_basket_2007_squads" (
  "player" text,
  "height" real,
  "position" text,
  "year_born" real,
  "current_club" text
);
SELECT COUNT("height") FROM "fiba_euro_basket_2007_squads" WHERE "year_born"<1977;