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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.

The following report shows websites for the industry Computers and Internet – Search Engines, ranked by Visits for the week ending 01/30/2010.

The following report shows search terms for the custom category ‘Retail 500′, ranked by largest increase for the week ending 01/30/2010.

In December 2009, Americans conducted 14.7 billion core searches, with Google Sites accounting for 65.7 percent search market share, virtually unchanged from 65.6 percent in November. Microsoft Sites grabbed 10.7 percent market share, up 0.4 percentage points versus November.
December 2009 U.S. Core Search Rankings
Google Sites led the U.S. core search market in December with [...]

The Nielsen Company today reported November 2009 data for the top U.S. Search Providers.
MegaView Search data – including total searches, unique searchers, search share, and all other search figures – cannot be trended with search results prior to October 2009 due to recent methodology changes.

Top 10 Search Providers for November 2009, Ranked by Searches [...]

The following report shows websites for the industry “Computers and Internet – Search Engines”, ranked by Visits for the week ending November 28, 2009.

In October 2009, Americans conducted 14.3 billion core searches, with Google Sites accounting for 65.4 percent search market share, up from 64.9 percent in September. Microsoft Sites grabbed 9.9 percent market share, up 0.5 percentage points versus September.
October 2009 U.S. Core Search Rankings
Google Sites led the U.S. core search market in October with 65.4 [...]