Naked graphs #5

Over the festive break, we'll be publishing highly graphic content. That's right: graphs, naked. We're very particular about labeling our graphs carefully so readers know what's going on. So for a change, we'll be featuring a graph each day with a few important features missing. See if you can work out what they're showing.

Clue: they're all based in the UK or some of its countries and cover one of our five core areas: Economy, Immigration, Health, Education and Crime.

Here's graph #5:

Comment on our Facebook page. Answer will be in tomorrow's article. Good luck!

The answer to boxing day's puzzle was trade union membership, which peaked in 1980 and has been in decline ever since. The figures are published by the Department for Business, Innovation and Skills in their trade union statistics series. Huge well done to those who got that.