This link goes to Editor and Publisher's ranking of the "Top 30" news sites by number of visitors, compares this month's visitors and last months, and also provides a link to last month's rankings. So the really intrepid can construct a data series if they want to simply by spending this Sunday on a time journey through E&P's ranking reports.
Interesting is that the Top 2 news sources, AP and Reuters are not included as popular sites to visit. It is quite amazing to think about this when clicking through a news site like Huffington Post for example. Check the sources of the news stories, not the opinion pieces. Reuters is as easily obtained as the BBC, and I think AP is too. UPI is a subscription. If we all prefer to go to "aggregators" where stories are pre-selected, probably based on a digital pre scan of tags for coherence with current areas of interest, and then a human interface, just what news are we getting when we visit these "most popular sites" (MPS)?