85% of Facebook users create content

"As of yesterday, Facebook claimed 955 million monthly active users, that is, people who have either visited the social network through its website or mobile site or clicked one of those ubiquitous share buttons distributed on countless third-party sites, like AdAge.com.
Anyway you cut it, the scale is vast. But just how many of those people are actually doing something on Facebook? Now the company is telling us.
In a recent interview, Facebook Head of Audience Insights Robert D'Onofrio said that about 85% of those monthly active users are creating some form of content. It needs to be said that Facebook defines content creation broadly and includes everything from uploading a photo or video to writing a status update to less time-intensive actions such as becoming a fan of something or liking a friend's post. Messaging and check-ins aren't included."

Source:  AdAge, 27th July 2012

Caution - creating content includes 'Liking'.  I'd love to see the stats excluding Liking - i.e. actually writing something, uploading a photo, or doing something more demanding.