The baby boom.  That’s all the servicemen returning from the Second World War and starting families, causing a huge temporary surge in the population, right?

True, but there’s a bigger one.  Look:

Click to enlarge

The surge in the 1960s peaks at about the same level as the 1940s and is wider - meaning more people.

Just in case you were wondering, I took 1980 as the date because it shows the 60s boom and it’s before the post-War crowd started to die off in any significant numbers (cancer starts to kick in in the mid-50s).  I am assuming that deaths up to this point among the post-War Baby Boomers were largely confined to pop stars.

I, of course, am right bang in the middle of the Real Boom.  I do not expect to draw a state pension.

All this came from here.  Not the greatest source but I’d challenge even them to get this very wrong.