Neat visualization: These seem related to the marimekko chart: https://observablehq.com/@d3/marimekko-chart / https://clauswilke.com/dataviz/nested-proportions.html#mosaic-plots-and-treemaps Oops, the first ":" was supposed to be a "!" :) Maybe one day comment editing will become a feature...

Yes indeed, this type of chart was originally, looks like, designed by https://www.mekkographics.com/product/power-of-mekko-charts/ . Absolute numbers and proportions are here nicely displayed together

Cool, thanks for the link.