Found some actual 2016 figures.
USA 17,539k cars sold, 80k EV, 64K PHEV sold with 570k EV + PHEV registered.
UK 2,690k cars sold, 10k EV, 26k PHEV sold with 91k EV + PHEV registered.
PHEV = plug-in hybrid electric vehicle
Looks like USA is embracing the EV better than the UK. .46% to .37%