From Audiostream:
http://www.audiostream.com/content/streaming-music-revenue-tops-cd-sales
"According to the Recording Industry Association of America's 2014 Report, CD sales topped out at $1.85 billion while total revenues from streaming, including ads and Internet radio, reached $1.87 billion overtaking CDs for the first time. "
http://www.audiostream.com/content/streaming-music-revenue-tops-cd-sales