That graph is spot on for my student life (I was in Liverpool 1988-91, then Edinburgh 91-95) then I lost track by leaving the country for many years. Beer pricing in the US is far more complicated.
When I first started drinking at the splendid age of 15, beer was 75p a pint, and when the police raided the pub they'd make you pour it down the loo, and then drive off without having made you leave the premises. I figure they had a deal with the landlord because we all had to buy a replacement pint.
The most expensive pint I had recently was £21, but it was awesome and I would have paid double (Pirate Noir by Prairie Artisan, and for the record, three of us shared it). That said, I'm still smarting from the time I footed a round of 3 Fountains kriek in the Rake the other year – for about twelve people. That didn't leave any change from £200.