How much is the total BBC 2 viewing in 1999?
CREATE TABLE "tv_ratings" (
  "year" text,
  "broadcast_date" text,
  "bbc_one_total_viewing" text,
  "bbc_one_rank" text,
  "bbc_two_total_viewing" text,
  "bbc_two_rank" text
);
SELECT "bbc_two_total_viewing" FROM "tv_ratings" WHERE "year"='1999';