National Survey of Employer-Sponsored Health Plans
The National Survey of Employer-Sponsored Health Plans is a major source of health benefit data for employers and the health care industry. More than 2,900 employers participated in the 2009 survey. Mercer offers the survey report and data tables for sale; customized data reports are also available.
http://www.imercer.com/products/US-national-health-plan-survey.aspx and related web pages. Accessed August 31, 2010.