Cuba should have been green then, no?That was faster than I thought.
It is countries with undisputed World Chess Champions.

Cuba should have been green then, no?That was faster than I thought.
It is countries with undisputed World Chess Champions.
Cuba should have been green then, no?![]()
Could be life expectancy?
Average age of population, darker meaning older?
I'd guess Portugal, Spain and Greece would have younger populations, not? And why would Ireland, the Netherlands and Luxembourg have such young populations? Especially the last one?
Average age of population, darker meaning older?
Could be life expectancy?
Percentage of people who are in retirement?