Spotify, Apple Drive U.S. Music Industry’s 8% First-Half Growth - Bloomberg

Check the full article for a stark sales chart by format

"After almost two decades of relentless decline caused by piracy and falling prices, the music business is enjoying a fragile recovery thanks to the growth of paid streaming services like Spotify Ltd. and Apple Music.
Retail spending on recorded music grew 8.1 percent to $3.4 billion in the first half of 2016, according to a draft midyear report from the Recording Industry Association of America that was obtained by Bloomberg News. That means the U.S. industry is on pace to expand for the second straight year -- the first back-to-back growth since 1998-1999."

Spotify, Apple Drive U.S. Music Industry’s 8% First-Half Growth - Bloomberg