Network share of the prime-time audience has fallen by fully one-quarter since 1980.

The President used his prime-time audience to address the concerns of American citizens.

CNN's prime-time audience increased 40 percent from the year before, to 662,000 people.

It's not all that long ago since a few TV networks could attract up to 90% of the available prime-time audience.

The three major television networks held just 64 percent of the prime-time audience last week, in part because of the earthquake.

A1 Television ratings indicated only a small fraction of the prime-time audience watched the first night.

The network's prime-time audience is roughly 70 percent male.

In 1983, the networks controlled 76 percent of the prime-time audience.

Network television's share of the prime-time audience dropped to 67 percent last year from 92 percent a decade ago.

As a result, the four networks' share of the prime-time audience has fallen to an all-time low.