I imagine if you were to plot those numbers on a graph and add the number of gig economy jobs, the lines would pair up pretty closely.
It'd be genuinely interesting to see how many people only ever do one CBT and don't renew it or go on to do their tests.
6 of my kids are old enough to ride. Only one has shown any interest in it and not until his mid twenties. You go into a bike shop now and it's like a Saga day out, all sorts of lovely small bikes available and they aren't selling. I remember the local honda dealer bing rammed with NS125Rs and MTXs. Now you see one solitary little 125 tucked away in the corner.