Global Warming Research Datapoint

I’m staring at my car, which survived the past six NJ winters without looking much the worse for wear.

At least compared to today.

Data research question of the Day: Any way to get data on the number of car washes done in the winter in, say, the latitude of the lower Rustbelt over the past thirty years?

I would give odds that the milder winters have driven the number down, even adjusted for income changes, etc.