Does anyone know if the thresholds for being "overweight" and "underweight" have changed over time? I mean, with so many people getting heavier and heavier has the standard crept up so that "underweight" isn't even skinny anymore?
Excluding the fact that average height has increased gradually over time.
It was lowered in July 1998 ("overweight" was reduced to 25 from men: 27 and women: 28)
https://www.nytimes.com/1998/06/04/us/us-to-widen-its-defini...
https://well.blogs.nytimes.com/2014/04/14/a-number-that-may-...