comScore's U.S. search engine share for January 2016 is out, and it shows a fairly stable status for the major players, except that the number of searches is slightly up, and the search share reflected in that. Only AOL Inc shows a decline.

Google sites once again dominate at 63.8%, with Microsoft sites at 21.3%, Yahoo sites at 12.4%, unchanged since the previous month of December 2015.

Of course, these figures are desktop only, and it'd be interesting to compare mobile search share.

http://www.comscore.com/Insights/Market-Rankings/comScore-Releases-January-2016-US-Desktop-Search-Engine-Rankings

comScore Explicit Core Search Share Report* (Desktop Only) January 2016 vs. December 2015 Total U.S. – Desktop Home and Work Locations Source: comScore Search
Core Search Entity	Explicit Core Search Share (%)
	Dec-15	Jan-16	Point Change
Total Explicit Core Search	100.0%	100.0%	N/A
Google Sites	63.8%	63.8%	0.0
Microsoft Sites	21.1%	21.3%	0.2
Yahoo Sites	12.4%	12.4%	0.0
Ask Network	1.6%	1.7%	0.1
AOL, Inc.	1.0%	0.9%	-0.1

*“Explicit Core Search” excludes contextually driven searches that do not reflect specific user intent to interact with the search results.