From the Centre College Alumni Survey.

When asked to list their most important source of news, the alumni said:

10% Local television
8% Network television
13% Cable television
19% Local newspaper
8% National newspaper
17% Radio
23% Websites
(Less that 1 percent said that they did not follow the news).

I am particularly impressed at how many list websites as their primary news source. This is surely a big change from even five years ago.