The average cost of employer health coverage offered to workers rose to nearly $20,000 for a family plan this year, according to a new survey, capping years of increases that experts said are chiefly tied to rising prices paid for health services.

Annual premiums rose 5% to $19,616 for an employer-provided family plan in 2018, according to the yearly poll of employers by the nonprofit Kaiser Family Foundation. Employers, seeking to blunt the cost of premiums, also continued to boost the deductibles that workers must pay out of their pockets before insurance kicks in