(Telecompaper) Global revenues from streaming and subscription music services increased 51.3 percent in 2013 to break the USD 1 billion level for the first time, according to data from the International Federation of the Phonographic Industry (IFPI). Overall global music sales fell by 3.9 percent to USD 15 billion in 2013. Global revenues from subscription and advertising-supported streams now account for 27 percent of digital revenues, up from 14 percent in 2011. More than 28 million people worldwide now pay for a music subscription, up from 20 million in 2012 and 8 million in 2010. Digital downloads remain a key revenue stream, accounting for 67 percent of digital revenues. Revenues from downloads globally fell by 2.1 percent in value, with this fall offset by increases in streaming and subscription revenue.