According to comScore, Yahoo only trailed Google by 6.5 percentage points in search market share in June 2005 (36.9% versus 30.4%).
By the end of September 2006, that gap had widened to a 17 percentage point advantage, with Yahoo giving up some share and Google grabbing a significantly bigger share from its rivals large and small. Google ended the period with a 45.1% share versus 28.1% for Yahoo.