With strong reviews and goodwill from its well-liked predecessor, Dawn of the Planet of the Apes easily ruled the domestic box office this weekend.Overall, though, it was another slow weekend at U.S. movie theaters: the Top 12 earned $139.7 million, which is down 26 percent from the same weekend last year.Debuting at 3,967 theaters, Dawn of the Planet of the Apes earned an estimated $73 million this weekend.