The Physical Quality of Life Index shorter called PQLI is a good measure for development. This is because it measures literacy rate, infant mortality, life expectancy at age one that is all equally weighted on a 0 to 100 scale for fairness. Every single one of those criteria will be higher in developed countries and lower in less developed ones.
...WOW... Well "Deku" use Detroit smash on the girl, no but seriously talk to her about this issue (which never works but everyone says to do it) . Just tell on her.