Don’t know what the % is but a lot of young ens have no intention of buying a car. My lad is managing without one (albeit in a city centre Fishergate apartment) whereas when I was his age I had to save up for an XR3.
Becomes a problem when they leave the city to raise a family in the suburbs.
Also city centres will be squeezing the pips on ICE’s in future - Sheffield just bringing one in for commercial vehicles/taxi’s.