Employees of midsize and large companies in 2015 paid an average of $4,700 for their health insurance, up from $2,001 in 2005, according to recent analysis from Aon Hewitt.

Because they are looking for solutions to high costs, companies are changing the design of their benefit programs, Aon Hewitt Senior Vice President Mike Morrow said, moving toward leaner plans. In fact, 38% of employers have increased their participants’ deductibles and/or copays in the last year, and another 46% may do so in the future, the report from Aon said.