The percentage of persons aged 18–64 years by household telephone status and select characteristics, NHIS, United States, 2003 and 2013.

Note. 95% CI = 95% Confidence Interval; HIV = human immunodeficiency virus; NHIS = National Health Interview Survey
a Persons in cellphone-only households are respondents living in a household with only a working cellphone. Persons in landline households are respondents living in a household with a working telephone that is not a cellphone. Data not shown for respondents living in a household with no cellphone or landline telephone, which remained relatively stable and <2% of respondents in all years.
The percentage of persons aged 18–64 years by household telephone status and select characteristics, NHIS, United States, 2003 and 2013.