A nice look at how domain names are spread out throughout the world. It also shows where the main technology leaders are based. A small country like South Korea (.kr) that are pioneers when it comes to robotics have a large amount of websites under their domain.
Unfortunately it does not cover .com which is a universal domain. I suspect that domain would need a content rather than a country to reflect its use.
The internet lets us seek and share information, across borders and across vast distances, with unprecedented speed and ease. At the end of 2015, there were an estimated 3.2 billion internet users worldwide, up from 400 million in 2000. The international nature of the internet was affirmed in the mid-eighties, when a system was agreed for allocating each country its own space online. Each would get a two-letter code within the Domain Name System, the address book of the internet.