U.S. workers may be feeling better about employer-sponsored life and disability insurance plans.

Researchers at Principal Financial Group Inc., Des Moines, Iowa, have published data supporting that possibility in a summary of an August survey of 721 retirees and of 1,360 adults working for U.S. companies with 10 to 1,000 employees.

The percentage of employees who assign a rating of 8, 9 or 10 on a 10-point scale to their benefits has increased to 50% for disability insurance, up from 43% in August 2005.

The percentage of workers giving high marks has increased to 50%, from 45%, for life insurance; to 56%, from 53%, for defined benefit pension plans; and to 52%, from 50%, for defined contribution retirement plans, according to Principal.