According to Ofcom's recent infrastructure report for 2011, British households download 17GB on average per month over their fixed broadband lines. That's the equivalent of streaming about 12 hours of BBC iPlayer.
Considering more and more media services are pushing towards the streaming model for content delivery -- Spotify, LoveFilm, YouTube, the terrestrial catch-up services and even Sky is big on streaming -- 17GB seems pretty low. Of course it's an average; some users will fall into the several-hundred gigabytes bracket and some will use almost nothing. If I had to guess how much data I burn through during a month, we're probably looking at the 200-300GB mark on my fibre connection. If you didn't stream or download anything, that's a hell of a lot of Facebook stalking for your 17GB's worth. [Ofcom (PDF) via BBC]