How many attended the game on 12/17 with stephen jackson as the leading scorer?
CREATE TABLE "december" (
  "date" text,
  "visitor" text,
  "score" text,
  "home" text,
  "leading_scorer" text,
  "attendance" real,
  "record" text
);
SELECT SUM("attendance") FROM "december" WHERE "leading_scorer"='stephen jackson' AND "date"='12/17';