I have no idea how to figure this out. But my thought process is: What % of people in a given region in a given month travel outside: a) Their city b) Their

I have no idea how to figure this out. But my thought process is: What % of people in a given region in a given month travel outside: a) Their city b) Their state/providence c) Their country? and then compare it to other countries. I suspect there are many places it could have started with way more international travel.. which would have made the first wave hit more places at once.