The Most Popular Channels report below refers to the most frequently viewed pages on The chart below lists the top 20 channels for 2013 by page views. There are over 1,500 channels. The top 20 represent 16.4% of page view traffic.

While the popularity of specific pages on stays generally consistent month to month, it can fluctuate depending on emergency outbreaks, campaigns, press releases, news announcements, public awareness of an event, and other promotional efforts designed to highlight specific topical content and public health issues.