According to a recently released government data brief, in 2012:

• There were an estimated 929 million physician office visits, or 301 physician office visits per 100 persons
•  Females (342 visits per 100 females) had more office visits overall than males (258 visits per 100 males)
• The visit rate for adults aged 65 and over was 592 visits per 100 adults
•  The visit rate for adults aged 18–64 was 264 visits per 100 adults
• The visit rate for children under age 18 was 232 visits per 100 children

Source: "Variation in Physician Office Visit Rates by Patient Characteristics and State, 2012,"NCHS Data Brief Number 212, Centers for Disease Prevention and Control, September 2015, http://www.cdc.gov/nchs/data/databriefs/db212.htm#findings