A quick search for page file types in Google yielded these results:

  • HTML: 3,810,000,000
  • ASP: 860,000,000
  • ASPX: 475,000,000
  • PHP: 1,100,000,000
  • PDF: 230,000,000
  • CFM: 399,000,000

HTML is first followed by PHP.

In case you wondered about the advanced searches on Google.

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