The gp observation is anecdotal, right?

In 2019 Germans made more international tourism trips than americans, despite having only a quarter of the population.

But the observations depend on where you travel and see other travellers, right? Go to nw mexico and I expect most tourists are from the us? Whereas mallorca is practically the southernmost german bundesland? And cyprus presents plenty of russians?

And comparing geography: Germany is geographically much smaller than the US, and in a place like Liechtenstein it is easy to make an international trip just to go shopping, even if you take the bike.