TV Ratings Report
Networks sell advertising time based principally on their performance among key demographic groupings, 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
Size of group: 124 million
Note: Each rating point equals 1% of group.
Sources: Nielsen Media Research, networks
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