Fully 76 percent of U.S. internet users earning more than $150,000 read blogs, up from 57 percent two years ago, according to a new study by the Luxury Institute. Furthermore, 25 percent themeselves blog, up from 18 percent in 2005.

The figures compare with 25 percent of all U.S. internet users who say they read blogs and 9 percent who are bloggers, according to the Pew Internet & American Life Project.

The Luxury Institute study also found that 55 percent of wealthy Americans use an instant messenging service, compared with 39 percent of general web users, and that 31 percent of wealthy Americans use a social-networking site, versus 16 of all web users.

The Luxury Institute's survey was conducted online, in March, among 1,000 web users earning more than $150,000 a year.