Statistics

Statistics

Between 2005 and 2010, the number of Web users doubled, and was expected to surpass two billion in 2010.^[71] According to a 2001 study, there were a massive number, over 550 billion, of documents on the Web, mostly in the invisible Web, or Deep Web.^[72] A 2002 survey of 2,024 million Web pages^[73] determined that by far the most Web content was in English: 56.4%; next were pages in German (7.7%), French (5.6%), and Japanese (4.9%). A more recent study, which used Web searches in 75 different languages to sample the Web, determined that there were over 11.5 billion Web pages in the publicly indexable Web as of the end of January 2005.^[74] As of March 2009, the indexable web contains at least 25.21 billion pages.^[75] On July 25, 2008, Google software engineers Jesse Alpert and Nissan Hajaj announced that Google Search had discovered one trillion unique URLs.^[76] As of May 2009, over 109.5 million domains operated.^{[77][not in citation given]} Of these 74% were commercial or other sites operating in the .com generic top-level domain.^[77]
Statistics measuring a website's popularity are usually based either on the number of page views or on associated server 'hits' (file requests) that it receives.