In the United States, per-child spending doubled from the 1970s to the 2000s, according to a 2013 paper by Sabino Kornich of the University of Sydney and Frank Furstenberg of the University of Pennsylvania.
Why Child Care Is So Ridiculously Expensive

Three broad reasons obtaining care for kids now costs as much as buying a brand new Hyundai Elantra each year.
Fuente: Derek Thompson - The Atlantic, 26 November 2019.
Fuente: Derek Thompson - The Atlantic, 26 November 2019.