Maybe as a rule of thumb it would always be the lowest bracket for the US. I live in the Netherlands, and the mode here is as a rule of thumb about 79% of the average. This gives a mode of 44000 euros annually. So it doesn’t have to be the lowest bracket.
It would still always be the lowest bracket, because most people make little and few people make much.
If you look at the horizontal lines here you get 50k brackets:
https://fourpillarfreedom.com/wp-content/uploads/2018/11/ind_inc0-1.jpg
The first bracket is ~65% of the population, the second bracket ~25%, the third bracket ~5%
Maybe as a rule of thumb it would always be the lowest bracket for the US. I live in the Netherlands, and the mode here is as a rule of thumb about 79% of the average. This gives a mode of 44000 euros annually. So it doesn’t have to be the lowest bracket.
Well, that’s depressing.