Nearly 100 demonstrators open umbrellas in unison in a symbolic gesture over the proposed expansion of Medicaid coverage last month in front of the Pike Market Medical Clinic in Seattle. AP Photo/Elaine Thompson

For HR managers who have had a front-row seat to some of the more seismic changes in health care benefits in recent years, the latest Robert Wood Johnson Foundation report will sound more than familiar.

Its main findings: the percentage of Americans who receive health insurance through employers has fallen significantly over the last decade — from 69.7 percent nationwide in 2000 to just 59.5 percent in 2011.

Also, in total, 11.5 million fewer Americans receive their health coverage through their job, or a family member’s job, than did at the start of the century. In 2000, approximately 170.5 million Americans were enrolled in a plan through their employer compared with 159 million in 2011.

“Employers continue to shoulder about the same percentage of costs for employees’ health insurance as they did 10 years ago, but everyone’s costs have increased dramatically,” Dr. Risa Lavizzo-Mourey, president and CEO of the Robert Wood Johnson Foundation, said in a statement.

“Higher costs naturally translate into fewer employers offering insurance coverage, and fewer employees accepting it, even when it is offered,” she added.

The report shows: