Median Age Metrics Explorations

My latest obsession has been looking up median ages of countries. It's a whirlwind of a subject and my mind meanders while I write this. I am someone who for all practical purposes is always thinking about metrics, data, conditional probabilities, human behavior, energy, and how they intertwine in stochastic systems. Median age for the last decade wasn't on my mind as much, but now it's going…