87.8% of persons of all ages, who were interviewed from January to September 2015,

... had a usual place to go for medical care, compared to 85.4% in 2010 and 87.9% in 2003.

Source: "Early Release of Selected Estimates Based on Data From the National Health Interview Survey, January–September 2015," National Center for Health Statistics/Centers for Disease Control and Prevention, February 2016, http://www.cdc.gov/nchs/data/nhis/earlyrelease/earlyrelease201602_02.pdf