Forgive my hyperbole, and yes I probably live in a London bubble which biases my personal anecdata set, but the data you've shared is a U shaped* which starts a

Forgive my hyperbole, and yes I probably live in a London bubble which biases my personal anecdata set, but the data you've shared is a U shaped* which starts at the 1940s and is on a trajectory for arriving back there. * with the exception of the Black demographic