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Simone Biles earned a fourth gold medal on Tuesday, driving NBC’s primetime Olympics viewership on the final day of competition in Rio for the U.S. women’s gymnastics team.

Biles, one of the brighest U.S. stars to emerge from the Rio games, dazzled in her performance in the floor exercise. Her teammate Aly Raisman also scored the silver medal in the same competition.

NBC’s primetime averaged reached a 16.6 household rating and 27 share and 8.2 rating in adults 18-49. That’s nearly a rating point higher than the 15.6 average for the 2016 games to date, indicating viewer interest in the showings of the U.S. women’s team that has dominated the gymnastics competition in Rio. NBC Sports noted that the last round of gymnastics competition drew 554,000 unique users on NBCOlympics.com and the NBC Sports app on Tuesday.

NBC’s coverage also included beach volleyball and track and field events. Christian Taylor of the U.S. took the gold medeal for the men’s triple jump.

Overall, U.S. athletes are leading the games by a wide margin, with Americans accounting for a total of 84 medals so far, 28 each in the gold, silver and bronze heats. The Rio games conclude Aug. 21.

The top local markets for NBC on Tuesday were: Salt Lake City (20.5 household rating/39 share), Denver (19.8/38), Austin, Texas (19.5/35), Columbus, Ohio (18.7/31) and Richmond, Va. (18.2/30)

(Pictured: U.S. gymnasts Aly Raisman and Simone Biles)

Standout Athletes of the 2016 Rio Olympics