Adults dominate social-networks in US

Forty-seven percent of all social-networking users in the US are adults over age 35, while just 16 percent are between 16 and 22.Social-networking activities have nearly doubled since 2008 by attracting older users. The amount of time users devote to social networking has grown dramatically. Users spend an average of 16.6 percent of their online time at social-networking sites, up from 8.3 percent in 2007. Though the increase in time is no big surprise, whats very interesting is the rapidly changing dynamics of the market.In May social network giant Facebook attracted 157.2 million US visitors followed by Linkedln with 33.4 million viewers, Twitter 27 million viewers and Tumblr with 10.7 million visitors.