What is the total of overall values with a safety position in a round greater than 1?
CREATE TABLE "1998_new_england_patriots_draft_selectio" (
  "round" real,
  "overall" real,
  "player" text,
  "position" text,
  "college" text
);
SELECT COUNT("overall") FROM "1998_new_england_patriots_draft_selectio" WHERE "position"='safety' AND "round">1;