What happened to newspaper believability?

People's faith in media credibility has been falling for some time. I'll examine reasons for this in this blog - examples abound, that is for sure.

But I found it interesting that in the late 1980s, newspaper believability dropped more than television believability:

Chart courtesy of State of the News Media.

NBC's believability dropped 3 points from 1985 to 1989. ABC dropped 7 points, CBS dropped 10 points, while familiar daily newspapers dropped 13 points.

These days newspaper believability is down underneath 60 percent, while the networks hover under 65.

What did newspapers do, or not do, to lose readers' faith?