Global Internet traffic is expected to quadruple between 2010 and 2015, according to data provided to Mashable by Cisco. By that time, nearly 3 billion people will be using the Internet — more than 40% of the world’s projected population. On average, there will be more than two Internet connections for each person on Earth, driven by the proliferation of web-enabled mobile devices. The rest of the world will experience more moderate growth in terms of traffic, but the number of devices per person is forecast to increase significantly. By 2015, there will be an average of 5.8 devices per person in North America, 5.4 in Japan and 4.4 in western Europe.