The folks over at Priceonomics.com did a lengthy research article on what Americans listen to on the radio these days.
Take a look at the full article here.
One stat that popped up was the percent of people who listen to the radio:
Though people have been predicting its demise for years, traditional radio continues to be an important part of American life. 59% of Americans listen to the radio once a day and 91% do so weekly. As of 2012, more Americans listened to the radio on a daily basis than used the internet or read newspapers/magazines.