Add links to related resources from other countries?

[jbracher]

I suggest adding a list of links to similar data sets from other countries at the bottom of the readme file. I stumbled across this one from the US: https://docs.google.com/spreadsheets/d/1zu9qEWI8PsOI_i8nI_S29HDGHlIp2lfVMsGxpQ5tvAQ/htmlview
Also, I kind of like their wide format, which could be a helpful summary of the more detailed long format provided in this repo.