Priest shortage in the Catholic Church
In the years since World War II there has been a substantial reduction in the number of priests per capita in the Catholic Church, a phenomenon considered by many to constitute a "shortage" in the number of priests. From 1980 to 2012, the ratio of Catholics per priest increased globally, with the number of Catholics per priest going from 1,895 to 3,126.
Source: Wikipedia — Priest shortage in the Catholic Church (CC BY-SA 4.0)