Wikimedia sites, which include Wikipedia, Wikionary, Wikibooks, Wikimedia Commons, Wikiquote, and nearly a dozen more, now see over 500 million unique visitors a month.

The previous high was set in May of 2012, when Wikimedia Foundation sites saw 492 million uniques. In March, the family of sites saw an astounding 517 million unique vistors. The data comes courtesy of the latest comScore Media Matrix.

“In the Wikimedia movement, we have a vision statement that inspires many contributions to our endeavor: Imagine a world in which every single human being can freely share in the sum of all knowledge. That’s our commitment,” says Wikimedia Foundation Executive Director Sue Gardner.

“The idea of enabling every single human being to freely share in the sum of all knowledge is still as audacious as ever – but it’s also starting to look like an achievable goal, if we come together to make it happen.”

The increase in uniques has also had an impact on how long readers stay and how much content they consume. Gardner says that people are staying longer and reading more.

“Over the past 12 months, Wikipedia monthly page requests increased from 17.1 billion to 21.3 billion, with the mobile share increasing to roughly 15 percent of the total, or more than 3 billion monthly views. We’re also gratified to see growth in significant target areas: in India, traffic as a percentage of our worldwide total increased from 4.0 percent to 4.8 percent; in Brazil it increased from 3.6 percent to 5.9 percent.”

Speaking of Sue Gardner – she’s not long for the position of Wikimedia director. A couple of weeks ago, she announced that she would be stepping down from the job – not right away, as she expects to take 6 months or so to find a replacement.