|Electrical Demand in
||The demand for energy is growing, mostly because the population
is growing. However, the demand for electricity is growing faster
than the population.
In 1949, the US used 255 billion kWh (9.2 * 10^14 joules), but by 1997, the annual usage had grown to 3120 billion kWh (1.1 * 10^19 J = 11 EJ).
Until about 1982, industrial usage exceeded residential usage. Industrial usage dropped by 10% rather abruptly and since then has equalled residential usage. In 1997, they were in a virtual tie at about 1000 billion kWh (3.6 EJ).