Since 2006, the number of Internet users has more than doubled to 39% of the world’s population.

Incredibly, by 2017 there will be an additional billion more Internet users. Who will those users be?

This infographic created by InternetServiceProviders.org profiles what Internet users will be like in 2017:

What does this growth mean for Twitter?

With the network’s increasing emphasis on advertising, TV partnerships, and consumer marketing, clearly it’s making a run for Facebook’s money. Twitter launched in 2006, grew to 100 million users by 2010, and soared to 200 million users by 2012.

Here’s a quick glance at “the race to second place” among Twitter, Tumblr, Instagram, and Pinterest (via The Atlantic):

The question is what the growth curves of today’s major social networks will look like by 2017.

(Source: InternetServiceProviders.org. Http image via Shutterstock.)