The chart shows ratings performance by network....

The chart shows ratings performance by network. Networks sell advertising time based principally on their performance among adults 18-49.

Prime Time

NBC

Last week: 7.9

Season to date: 6.8

Fox

Last week: 6.0

Season to date: 5.6

ABC

Last week: 4.9

Season to date: 5.6

CBS

Last week: 4.2

Season to date: 4.3

UPN

Last week: 2.1

Season to date: 2.0

WB

Last week: 1.4

Season to date: 1.3

Note: Each rating point equals 1% of group

Sources: Nielsen Media Research, networks