Preparing for international travel = researching the confusing world of international outlets.
There aren't good visuals for how widely used certain plug types are. So I made my own. Looking at what countries use what outlet types wasn’t enough, I wanted to see how population of those countries affected the popularity.
C (and E and F which are the grounded versions) is nicknamed the europlug and the most popular worldwide. C outlets are becoming illegal in favor of E and F styles which fit the same plug, but are grounded.
D is used in India and Nepal. D plugs are among the most dangerous ones in the world because the prongs are not insulated.
I is used mainly in China and Australia. It was easier for Australia to manufacture a plug with flat prongs, which lead to the adoption of this type.
G is used in the UK. And lots of places that England has ruled.
N is only used in Brazil. Where it works with types of voltage in the country, which isn’t always listed. Which is really scary and dangerous.