Also, before anyone cries, these are honestly great numbers.
Avatar held so well the first weekend partially because of a snowstorm that moved a lot of opening weekend business to Christmas weekend. Star Wars is coming off an OW over 3x the size of Avatars. Realistically, numbers can only get so big, especially with 5 new wide releases eating up showtimes.
150-160m 2nd Weekend is better than all but the very highest of openers can do on their OW. That also puts a 100m+ 3rd weekend in the cards. That's huge.