What is the average rank of the movie with an opening week net gross more than 81,77,00,000 after 2012?
CREATE TABLE "biggest_opening_week_nett_gross_first_7_" (
  "rank" real,
  "movie" text,
  "year" real,
  "studio_s" text,
  "opening_week_nett_gross" real
);
SELECT AVG("rank") FROM "biggest_opening_week_nett_gross_first_7_" WHERE "opening_week_nett_gross">'81,77,00,000' AND "year">2012;