That didn't sound right as in my experience most people do a foreign trip at least once a year. Turns out it of course very much depends on the country: Finland travels the most while US is among the least foreign-travelling westerners. That according to https://www.worldatlas.com/articles/countries-whose-citizens..., which says every Finn does 1.7 foreign trips per year on average.

Sorry for the spammy site but hard to look for hard source data on mobile.