In January 2010, Americans conducted 15.2 billion core searches, with Google Sites accounting for 65.4 percent search market share. Microsoft Sites grabbed 11.3 percent market share, up 0.6 percentage points versus December.

comScore Core Search Report* January 2010 vs. December 2009 Total U.S. – Home/Work/University Locations Source: comScore qSearch
Core Search Entity	Share of Searches (%)
	Dec-09	Jan-10	Point Change Jan-10 vs. Dec-09
Total Core Search	100.0%	100.%	N/A
Google Sites	65.7%	65.4%	-0.3
Yahoo! Sites	17.3%	17.0%	-0.3
Microsoft Sites	10.7%	11.3%	0.6
Ask Network	3.7%	3.8%	0.1
AOL LLC Network	2.6%	2.5%	-0.1

* Based on the five major search engines including partner searches and cross-channel searches. Searches for mapping, local directory, and user-generated video sites that are not on the core domain of the five search engines are not included in the core search numbers.