This graph from the ITU Telecommunication Development Bureau shows that almost 3 billion people - close to 40% of the world’s population - are using the internet.
Europe’s Internet penetration will be reaching 75% (or three out of four people) by end 2014, the highest worldwide. In the Americas, close to two out of three people will be using the Internet by end 2014, the second highest penetration rate after Europe. In Africa, almost 20% of the population will be online by end 2014, up from 10% in 2010.
This brings up the question, however, of how effectively are these people using the internet, and that is much more difficult to measure statistically.
Graph can be found at:
http://www.itu.int/en/ITU-D/Statistics/Documents/facts/ICTFactsFigures2014-...