The Gallup-Healthways Well-Being Index indicates those covered by government healthcare -- Medicare, Medicaid, or military/veterans' benefits -- has increased during the same period. More than one in four American adults are currently covered by government healthcare.
The decline in employer-based coverage and increase in government healthcare has occurred as the number of unemployed increased.
Nearly one in six American adults were uninsured in February, a figure that has been fairly steady since February 2009.
The results of the Gallup-Healthways Well-Being Index are based on telephone interviews conducted Feb. 1-28, of a random sample of 27,213 U.S. adults living in all 50 U.S. states and the District of Columbia.
The index has a margin of error of 1 percentage point.