Akamai just released their 8th annual report on the state of the internet for the first quarter of 2015:
Over the course of the last seven years, since the report was first published, the World Wide Web and the Internet have grown and evolved in significant ways. The number of Internet users has more than doubled to an estimated 3.2 billion in 2015, and while Cisco noted that the number of Internet-connected devices first outnumbered the human population in 2008, it now predicts that there will be three networked devices per capita by 2019, up from nearly two networked devices per capita in 2014. From rudimentary Internet-connected smartphones in 2008 to sensors in nearly any imaginable device in 2015, the so-called Internet of Things will continue to drive massive increases in Internet usage.
View this page on Akamai’s site with an executive summary, key figures from the report, various global regions as infographics (the one for the America’s is below) or download the full report: Akamai_State-of-the-Internet-Q1_2015 (PDF)