Internet usage is growing so rapidly that just its incremental, one-year growth between 2014 and 2015 will be equal to all of the Internet traffic recorded worldwide last year, CNN Money reported.

According to the annual Visual Networking Index released this morning by Cisco Systems Inc., global Internet traffic has increased eightfold over the past five years, and will grow by fourfold over the next five years, a compound annual growth rate of 32 percent.

Four years from now, the Internet’s traffic volume will be so large that every five minutes it will be the equivalent of downloading every movie ever made. In 2015, monthly Internet traffic will reach the equivalent of 20 billion DVDs, 19 trillion MP3s or 500 quadrillion text messages.

Experts consider Cisco’s forecast to be the gold standard for Internet analysis. The annual study, which began in 2008, has historically been accurate to within a 5 to 10 percent deviation — usually on the conservative side.

Cisco predicts that by 2015, Internet traffic will be significantly more mobile, and it will be made up of mostly video. The proliferation of smartphones, netbooks and tablet computers means that there will be roughly one mobile device for every individual alive in 2015. The company predicts there will be 7.1 billion mobile devices four years from now, at which point there will be 7.2 billion people on Earth, according to the World Bank.