"Looking back over the past 13 months, in addition to the growing share of searches, traffic to Google has continued to increase," she says. "The market share of visits to Google in July increased 25% over July 2007 and has grown each month since January in 2008. Retention of this increased traffic is also coming into play as Google has maintained a consistent returning visitor rate (visitors who have visited the website within a 30 day period) of 95% each month since October 2007 (when Hitwise began tracking this metric)."