Employment-based health insurance continues to be the predominant source of coverage for the non-elderly population.
Health Insurance Coverage of Non-Elderly Americans, by Source of Coverage, 2007

Source: SHADAC estimates from the Current Population Survey Annual Social and Economic Supplement, 2008.
Other Related Fact Sheets
Health Behavior [4]
Links:
[1] http://covertheuninsured.org/content/employment-based-coverage
[2] http://covertheuninsured.org/content/industry-and-occupation
[3] http://covertheuninsured.org/content/retiree-health-benefits
[4] http://covertheuninsured.org/content/health-behavior