Important to always remember when looking for data that a) not all data exists, or will be accessible to us, and b) best bets for finding data are the people who care enough about it to collect it, aka. if there's a government organization, research center, nonprofit or commercial data vendor that might be interested in this particular data, that's probably where I want to look first. For all of these nation-level datasets, also remember that most nations have a national statistical agency website. This is one of the first places I would be going to look for many of these things. (You can search national statistics + nation name in any search engine and you should find the site, though, of course, the English-language content may be more limited.) Bear in mind that there can be bias in data and you might want to trace the methodology or sources of some of your data and/or compare data from multiple sources. Please feel free to email me if you have any questions or would like some assistance!