This awesome infographic takes a look at the most popular websites every year from 1996 until 2013. It's pretty cool to see the rise and fall of sites. Take Microsoft for example, it's been pretty dominant since 1997 but Google that is now at the very top wasn't even on the radar until 2001.
It's interesting to see how some sites have worked their way up through the ranks gradually over the years and some sites like Facebook have risen to the top in literally just a year or two.
More Info: The Washington Post