The amount of electricity consumed during charging increases every year as there are more and more electric cars.
Noteworthy is that the share of consumption by all-electric vehicles increased over time and in 2017 stood at 57%, compared to 43% for plug-in hybrids. Five years ago, it was the opposite.
Total electricity consumption by PEV, 2011-2017 (source: energy.gov)
Source: Argonne National Laboratory, Impacts of Electrification of Light-Duty Vehicles in the United States, 2010-2017, ANL/ESD-18/1, January 2018.