[GretchenEE]

I think you might get some useful data from the (not sure exactly of the title) Center for Media Research, which monitors what the different networks and news sources cover and how much time they spend on each subject. They are not coming from a liberal viewpoint.

[GretchenEE]

I just found a story on another thread that is taken from the Media Research Center, so I found their URL. This may be to a specific article but it should get you close enough to look for what you want.

http://www.mediaresearch.org/cyberalerts/2002/cyb20020716.asp#3