Search engine market shares in Jan 2006: Google - 41.4%, Yahoo! - 28.7, MSN - 13.7% (ZDNet Blogs – IT Facts)
“comScore Networks reported that in January 2006, Google reinforced its status as market leader of the US search market with a 41.4% share of all searches submitted, up more than 6% versus January 2005. Yahoo! Search maintained the #2 spot in the ranking with 28.7% share of all searches, while MSN Search ranked third capturing 13.7% of all online searches.”
UK search engine market shares: Google - 75%, Yahoo! - 9.3%, MSN - 5.46% (ZDNet Blogs – IT Facts)
“Information Week quotes WebSideStory report on search engine usage in the UK. Google is leading the market with 75% of the search traffic, followed by Yahoo! with 9.3%, MSN with 5.46%, AOL with 4.21% and Ask with 2.28%.