Adults aged 65 or more years increasingly are getting rid of their landlines and exclusively using cell phones to make and receive telephone calls, according to preliminary results from the latest National Health Interview Survey.

The survey found that 19.3% of these older adults lived in wireless-only households during the January to June 2015 survey period, according to latest report from the Centers for Disease Control and Prevention’s National Center for Health Statistics. The report includes data going back to the January to June 2012 time period, when 10.5% of households with adults aged 65 or more years were totally wireless. The percentage has been increasing ever since.

Similar growth was seen among those aged 45 to 64 years, where the percentage of cell phone-only users consistently was higher. Wireless-only households among this group increased from 25.8% in the January to June 2012 time period to 40.8% in the January to June 2015 survey.