Porn is only 35 percent of all Web sites?

IT security firm Optenet [PDF] has published a report that categorizes the content on the Internet. : The number of Web sites worldwide surpassed 155 million at the end of 2007 . . . The Optenet study showed that although pornography as a total percentage of Internet content has actually decreased slightly since 2006, it still is by far the largest category of content on the Internet, representing 35 percent of all Web sites. Online shopping represents the second biggest category (10.5 percent), followed by travel (7 percent), advertising sites (6 percent) and sports (4.5 percent).