Looks like we're down to about 11.4kWh (working on a measurement; 74% is 8.4kWh) in our 2016 Spark EV. It has 22.5k miles.
It sits in the warmish south-facing garage in San Diego, charged to 100% all the time (I can't be bothered with keeping it at 60% for the wife, and with daytime...