average annual increase in health care costs
U.S. Health Care Cost Increases at Lowest Rate in Nearly 20 years: Aon. After plan design changes and vendor negotiations, the average health care rate increase for mid-size and large companies was 3.2 percent in 2015, marking the lowest rate increase since 1996, according to a new analysis by Aon. Aon projects average premium increases will jump to 4.1 percent in 2016.