Many people died and killed themselves, leaving the population low
“Total cost of all factors of production consumed or used in producing a good or service. ... Market price: Market price is the price at which a product is sold in the market. It includes the cost of production in the form of wages, rent, interest, input prices, profit etc”
Natural gas was the largest source—about 40%—of U.S. electricity generation in 2020. Natural gas is used in steam turbines and gas turbines to generate electricity. Coal was the third-largest energy source for U.S. electricity generation
Do you have a pic of the maps