Oh yeah, they normalize IQ every year, and 100 is always used as the median.
But thanks to the Flynn Effect, getting a 100 (the number they always choose for the middle) in 2024 means you’re significantly smarter than someone who got a 100 in 1990.
So when Carlin said, “think of a person with average intelligence” he was calling to mind (to his 1990 audience) a person who was average in 1990 but would score [EDIT: I originally said 70s to 80s, but I was off by a lot. Such a person would actually score right around 90 points] today.
This is what happens when you take the lead out of gasoline.