It was a good year for music streaming services as the industry saw growth in 2013 and worth over a billion dollars.

According to data released by the Recording Industry Association of America (RIAA) in March 2014, revenues from streaming music services increased by 39 percentage points, which was enough for $1.4 billion in revenue. The growth of the subscription music streams helped boost the U.S. music industry's revenues to $7 billion.

The RIAA also revealed subscription music services accounted for 21 percent of the total music industry revenue in the U.S. in 2013, which is an increase from 15 percent during 2012. Digital downloads led the revenue share with 40 percent ahead of physical music copies at 35 percent. Synchronization and joint ringtones and ringbacks rounded the top five with 3 percent and 1 percent respectively.

A reason for the rise of subscription-based music streams was credited to people becoming tired of advertisements.

"RIAA found that consumers were more willing to pay for subscriptions to streaming services last year -- maybe because they were tired of advertisements, maybe because they wanted all of the other benefits many subscriptions offer, or maybe both," noted eMarketer.

Regardless of the person's motive, subscription-based music services were the fastest-growing digital music format in 2013 -- by 57 percent -- compared to last year.

Worldwide wise, the International Federation of the Phonographic Industry (IFPI) stated overall digital music revenues grew at a "modest" 4.3 percentage points, which garnered $5.87 billion in revenue and 39 percent of the global music income. In comparison to 2012, digital music revenues represented 36 percent and $5.64 billion. Physical copies of music were still popular in 2013 worldwide with 51 percent, although it is a drop from 56 percent in 2012. In regards to subscription-based music streaming services, the IFPI also noted growth by 51.3 percentage points, which was enough to bring revenue to over $1 billion for the first time.

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