The 1.4 million copies make up about 10 percent of overall circulation for the top titles in the past four years, but some have lost more than others, E&P reported, citing an E&P analysis of Audit Bureau of Circulations data.

Steepest declines were at the San Francisco Chronicle, down 28.8 percent, the Los Angeles Times, down 20.2 percent and The Boston Globe, down 19.9 percent.

By comparison, USA Today increased its circulation by 2 percent, while the Post grew circulation 2.3 percent in the four years, although its most recent report stated it has lost circulation.

The E&P report points out that although many papers are seeing spiralling circulation, they are gaining online readers.

For the full report, visit the E&P Web site.