After thirteen weeks of the 2012-2013 broadcast television season (through Sunday, December 23, 2012), NBC is in first place among adults 18-49, with a 3.1 rating average, up 19% from last season. CBS was second, with a 2.8 rating average, down 15% from the prior season. ABC was third with a 2.4, down 8% from the previous season FOX was fourth with a 2.4, down 25% from last season. The CW finished last with a 0.8 adults 18-49 rating average, even with the previous season.
Among total viewers, CBS is ahead for the season averaging 11.620 million viewers. NBC is second with 8.838m, followed by ABC with 8.521 m, FOX with 6.737m, and CW with 1.920 million.
Each adults 18-49 rating point is a percentage of the adults 18-49 US TV population and equals 1.265 million adults 18-49. The season-to-date numbers are "Most Current" ratings, which are Live+7 Day for all but the two most recent weeks and Live+ Same Day for the two most recent weeks.
You can see last week's broadcast network primetime weekly TV ratings results here.
Nielsen TV Ratings Data: ©2012 The Nielsen Company. All Rights Reserved.