Some 69% of online Americans use webmail services, store data online, or use software programs such as word processing applications whose functionality is located on the web. Online users who take advantage of cloud applications say they like the convenience of having access to data and applications from any Web-connected device. However, their message to providers of such services is: Let’s keep the data between us.
http://www.pewinternet.org/PPF/r/262/report_display.asp