Apple is the top platform for US adults who pay for music content online, ahead of others such as Pandora and Spotify.
Some 34.3% of US recorded music revenues came from streaming services in 2015, reports the RIAA, up from 27% in 2014.
Digital music revenues worldwide rose nearly 7% last year to hit $6.85 billion, tying physical sales in share for the first time, at 46% each.
Among American adults who use audio players in the car, two-thirds first turn on the AM/FM radio when listening to music.
27% of US consumers listened to Pandora, vs. 7% who used Spotify.
Digital subscription and streaming revenues grew by almost 29% last year to reach roughly $1.87 billion, surpassing sales of CDs ($1.85 billion) in the process, according to a report from the RIAA.
Spotify reported that users created more than 14,000 playlists under the BMW program.
Some 44% of Americans aged 12 and up listen to online radio on a weekly basis, up from 36% last year and 33% the year prior.
US internet users ranked listening to music as the most important activity in their lives, at 22% of respondents.
US teen internet users said they found something else to listen to and waited for the original music to be available for streaming.