Guess the Map II: witty sequel titles failed me

Hint: It's not any kind of consumption.
 
The map is current.
 
Does the map represent percentage of population or absolute numbers?
 
The map measures absolute numbers.
 
North Korea has to be the key, but I can't see it. What do they have a lot of that is common in rich / wealthy countries?

Number of hospitals?
 
Amount of fertile land in the country?
 
I think a hint is necessary: look at the very first guess to the map, and think of something related to it.
 
I honestly don't see how it can be related to industrialization at all given the color of Bangladesh.
 
Possibly, but I recall reading somewhere that China was importing alot of iron.
 
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