I clanked together an interactive dashboard for the Bitcoin Wrench Attack archive; let me know what you think! Looks like I need to make some more mobile optimizations...
https://jlopp.github.io/phys...
On the per capita idea: determining bitcoin ownership by country is logistically challenging, and most estimates lean heavily on statistical projection. Some results run counter to intuition, like China outpacing the US in owner counts despite the ban, so any rate you display deserves a rough proxy label.