> There are only 160 million US passports in circulation (out of a population of 330 million. So roughly half > vast, vast majority have never left the US how

> There are only 160 million US passports in circulation (out of a population of 330 million. So roughly half > vast, vast majority have never left the US how does 1/2 of the population having a passport equate to the “vast, vast majority” having never traveled? How does this logic connect?