I think you need to account for inflation, which from 2000 to 2020 is 50% [0].

So 175%/150% => 116%, or 16% increase in tax revenue for a 15% increase in population.

Which means inflation adjusted tax revenue/capita has not meaningfully changed from 2000 to 2020.

[0] https://www.in2013dollars.com/us/inflation/2000?amount=1#:~:....