The above two charts show the percentage of households owning electrical appliances and the number of hours of housework per week in households.
The number of refrigerators in households was close to zero in 1920, but increased very quickly over the next 40 years. By 1960, 90% of households owned a refrigerator, and by 2000, this number became almost 100%. The number of vacuum cleaners in households in 1920 was 30% and increased at a consistent rate until 2000 and became 100%. The number of washing machines was 30% in 1920 and increased to 70% in 1960 and decreased until 1980. Then the number increased gradually to 75% in 2019.
In 1920, on average, there were 50 hours of housework per week, and the number decreased rapidly until 1960, when the number was 20 hours. Then the number decreased gradually, and the value in 2019 was 10 hours per week.
There has been a direct correlation between the number of appliances and housework. With the increase in household appliances, hours of housework decreased over the decades.
