Oh, get out of here with that dismissive nonsense. You did too. The difference between us is you presume that nearly none of them do and I openly acknowledge that a surprisingly high number of them do. The one of us generalizing about more of the 40 million is you, buddy
My generalization specifically acknowledges that it is a visible portion of a whole (NOT all) based on real-world experience. If a boy scout like me has witnessed it over and over and over in my life then it is relatively common even if it is impossible to know how common. Don't be obtuse.