Date Size Source
1996-07-15 24000000 http://www.tnl.net/blog/2005/09/27/google-has-24-billion-items-index-considers-msn-search-nearest-competitor/
1998-12-31 26000000 http://googleblog.blogspot.com/2008/07/we-knew-web-was-big.html
1999-01-05 34939067 http://www.searchengineshowdown.com/statistics/9901sizeest.shtml
2000-02-21 154000000 http://www.searchengineshowdown.com/statistics/0002sizeest.shtml
2000-07-11 1060000000 http://web.archive.org/web/20000711043326/http://www.google.com/
2000-10-27 1247340000 http://web.archive.org/web/20001027222150/http://www.google.com/
2000-12-03 1326920000 http://web.archive.org/web/20001203203800/http://www.google.com/
2000-12-31 1000000000 http://googleblog.blogspot.com/2008/07/we-knew-web-was-big.html
2001-04-07 700000000 http://www.searchengineshowdown.com/statistics/0104sizeest.shtml
2001-08-18 1387529000 http://web.archive.org/web/20010818015617/http://www.google.com/
2001-10-01 1610476000 http://web.archive.org/web/20011001003309/http://www.google.com/
2001-12-11 3000000000 http://www.google.com/press/pressrel/3billion.html
2002-01-24 2073418204 http://web.archive.org/web/20020124144701/http://www.google.com/
2002-09-15 2469940685 http://web.archive.org/web/20020915091548/http://www.google.com/
2002-11-30 3083324652 http://web.archive.org/web/20021130081132/http://www.google.com/
2002-12-31 3083000000 http://www.searchengineshowdown.com/statistics/sizeest.shtml
2003-10-16 3307998701 http://web.archive.org/web/20031016070058/http://www.google.com/
2004-02-17 6000000000 http://googlepress.blogspot.com/2004/02/google-achieves-search-milestone-with.html
2004-03-13 4285199774 http://web.archive.org/web/20040313050042/http://www.google.com/
2004-10-10 8000000000 http://googleblog.blogspot.com/2004/11/googles-index-nearly-doubles.html
2004-12-15 8058044651 http://web.archive.org/web/20041215094409/http://www.google.com/
2005-08-10 60000000000 http://battellemedia.com/archives/2005/09/google_announces_new_index_size_shifts_focus_from_counting.php
2005-09-26 24000000000 http://www.tnl.net/blog/2005/09/27/google-has-24-billion-items-index-considers-msn-search-nearest-competitor/
2005-08-31 8168684336 http://web.archive.org/web/20050831113132/http://www.google.com/
2006-07-01 45000000000 http://ilk.uvt.nl/events/dekunder.html
2008-07-25 1000000000000 http://googleblog.blogspot.com/2008/07/we-knew-web-was-big.html
2011-02-01 26500000000 http://netforbeginners.about.com/cs/secondaryweb1/a/secondaryweb.htm
2011-04-05 40000000000 http://www.worldwidewebsize.com/
2012-04-05 1150000000000 http://insidesearch.blogspot.com/2012/05/search-quality-highlights-53-changes.html
2013-04-04 50000000000 http://www.worldwidewebsize.com/