A new report by the Pew Research Center has provided more documentation on the growing popularity of audiobooks.

In a survey of 1,502 American adults conducted from January 8 to February 7 this year, Pew found that 20% of adults listened to an audiobook in the 12 months prior to the period in which the survey was conducted. In 2011, only 11% of adults said they listened to an audiobook.