Networks sell advertising time based principally on...

Networks sell advertising time based principally on their performance among key demographic groups, which vary based on the time of day. Ratings performance in these categories gives a rough indication of network revenue in the given period, though profitability can vary based on programming costs and other factors.

Prime Time

Ratings for adults 18-49

ABC

Last week: 4.5

Season to date: 4.7

*

NBC

Last week: 4.4

Season to date: 5.4

*

Fox

Last week: 3.9

Season to date: 5.0

*

CBS

Last week: 2.8

Season to date: 3.9

*

WB

Last week: 1.8

Season to date: 1.8

*

UPN

Last week: 0.0

Season to date: 1.1

Size of group: 123,900,000

Note: Each rating point equals 1% of group.

Sources: Nielsen Media Research, networks. Some information not available because of the Memorial Day holiday.