How many Joint Music Awards are there when the Total is larger than 18, in a Year after 2007?
CREATE TABLE "major_awards" (
  "year" real,
  "mrhma" text,
  "usca" text,
  "rthk" text,
  "joint_music_award" text,
  "total" real
);
SELECT "joint_music_award" FROM "major_awards" WHERE "total">18 AND "year">2007;