Wireless Substitution: Early Release of Estimates From the National Health Interview Survey, JulyDecember 2009, by Stephen J. Blumberg, Ph.D., and Julian V. Luke, Division of Health Interview Statistics, National Center for Health Statistics
“Preliminary results from the July-December 2009 National Health Interview Survey (NHIS) indicate that the number of American homes with only wireless telephones continues to grow. One of every four American homes (24.5%) had only wireless telephones (also known as cellular telephones, cell phones, or mobile phones) during the last half of 2009-an increase of 1.8 percentage points since the first half of 2009. In addition, one of every seven American homes (14.9%) had a landline yet received all or almost all calls on wireless telephones. This report presents the most up-to-date estimates available from the federal government concerning the size and characteristics of these populations.”
