 As CBS took the hardest hit from the switches, due partly to having been relegated to lower-tier affiliates in several major markets, NBC became the most-watched network in the United States, as it not only experienced the fewest effects of the switchover, but also benefited from a strong slate of programming at the time (including "Friends", "Frasier", "Seinfeld", "Law & Order", "ER" and "Dateline NBC").NBC would maintain its ratings lead until 1999, the year after it lost the AFC television rights to CBS, which overtook it for first place.After "Friends" and "Frasier" ended their runs in 2004, NBC largely struggled in the ratings until 2013.