Happened on a few sites that will generate an image of a map showing where you've been.
Using this one: http://www.defocus.net/visitedstates/generate.html
I decided on the following color code:
Red - Just passing through, less than two days of me driving the car in that state
Amber - Actually visited (I've driven the car in the state for up to 30 days)
Blue - Really visited (I've driven the car in the state for up to 180 days)
Green - Lived there (> I've driven the car in the state for more than 180 days)
In all cases that is the value for me driving the car. I've been to more states than that and lived in some without the car, etc. And, I suppose, some previous owner could well have used the car outside of New York state prior my acquisition of it.
What states have you driven your old Plymouth?