but the quote is also worthwhile:
In the last 6 months of 2007, nearly one out of every six households (15.8%) did not have a landline telephone, but did have at least one wireless telephone. Approximately 14.5% of all adults-more than 32 million adults-lived in households with only wireless telephones; 14.4% of all children-more than 10 million children-lived in households with only wireless telephones.
The percentage of adults living in wireless-only households has been steadily increasing. During the last 6 months of 2007, more than one out of every seven adults lived in wireless-only households. One year before that (that is, during the last 6 months of 2006), fewer than one out of every eight adults lived in wireless-only households. And 2 years before that (that is, during the last 6 months of 2004), only 1 out of every 18 adults lived in wireless-only households.
The percentage of adults and the percentage of children living without any telephone service have remained relatively unchanged over the past 3 years. Approximately 2.2% of households had no telephone service (neither wireless nor landline). Approximately 4 million adults (1.9%) and 1.5 million children (2.1%) lived in these households.