20 Countries with Northernmost Geographical Center

Thanks for the feedback and the ideas! I had thought of doing the full list from North to South, hadn't thought about jumping around! And I'm also planning 'Capital cities closest/furthest to their country's centroid', closest centroid of non-bordering countries and so on. In the notes I've written where I got the data: the Portland State University isn't complete so for the countries that aren't in that list (mostly tiny countries) I use the CIA website data which doesn't seem very accurate (DRC's centroid put exactly on the equator, for example). However I'm not sure how accurate/consistent this data is, so I was hoping for some ideas-contributions on that before I start making Excel formulas etc to create quizzes. For example it might be that the first website considers islands whereas the CIA doesn't, the PSU website says that if the center is on the ocean it's moved to the nearest point on the land, which I don't like.

I just imported the data from those links and converted from .csv to excel etc ;)