In just the past three months, Steam's user base has increased by 15 percent, bringing it up to 75 million users, Valve announced today.

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That's an increase of 10 million users since October, when Valve announced it had surpassed 65 million users. Since that time, the service has seen two major sales -- one in November , and a much bigger one in December . At one point during the latter sale, Steam's peak concurrent user count topped 7.6 million Valve announced these latest numbers at the Steam Dev Days Conference taking place in Seattle today and tomorrow. The conference is a developers-only event for those working with Steam and the Steam Machine (the Alienware version of which will be available in September ).It also provided some figures regarding worldwide sales data. More specifically, it provided a chart breaking down what percentage of Steam's sales various regions account for. Unsurprisingly, 81 percent of worldwide Steam sales in 2013 came from customers in western Europe and North America. Of that 81 percent, there was an almost-even split between those two regions, with North America just ahead at 41 percent.Meanwhile, Russia saw the biggest increase in sales during 2013 as compared with the prior year; sales were up 128 percent, far ahead of the country with the next biggest year-over-year bump, Brazil, which saw sales increase by 75 percent.

Chris Pereira is a freelance writer who spends his spare time agonizing over the final seasons of The X-Files. Check out what he's saying on Twitter and follow him on IGN