After twenty-five weeks of the 2012-2013 broadcast television season (through Sunday, March 17, 2013), CBS is in first place among adults 18-49, with a 3.0 rating average, down 3 percent from last season. FOX was second, with a 2.6 rating average, down 21% from last season. NBC was third with a 2.5, down 7% from last season. ABC was fourth with a 2.3, down 8% from last season. The CW finished last with a 0.7 adults 18-49 rating average, down 13% from the previous season.
Among total viewers, CBS is ahead for the season averaging 12.316 million viewers. ABC is second with 7.824m, followed by NBC with 7.245m, FOX with 7.135m, and CW with 1.843 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: ©2013 The Nielsen Company. All Rights Reserved.