Through 2020, the US cumulative vehicle in operation stock is well less than 3% for the combined vehicle powertrains of hybrids, BEVs, PHEVs, and FCEVs.
And in the modern EV era that began in 2010 with the Nissan LEAF and Chevrolet Volt, through 2020 there are 1.717 million BEVs and PHEVs (quietly) roaming the streets of America.
By comparison, since 1999 with the launch of the Toyota Prius hybrid, 5.835 million hybrids have been sold in the US. EVs (BEV and PHEV combined), now account for 0.6% of all vehicles on the road.