The two line graphs illustrate the proportions of families who had used three categories of electrical devices (Washing machine, Refrigerator, and Vacuum Cleaner) and the amount of time per week (in hours) spent on different type of house works (cloth washing, meal preparing, and cleaning) over a century (1920-2019)
Overall, the dependency on electrical appliances has been increased in a significant amount while the time for housework has been decreased over the century. The usages of refrigerators and vacuum cleaners had experienced a sharp growth but washing machine usages climbed slowly. Notably, families are relying more on automated devices with the time.
In 1920, refrigerator had the lowest shares, almost close to 0%, but the number had surged exponentially and reached its peak at 1980, approximately 55% in 1940, 90% in 1960, and 100% in 1980. Since then, the figure remained stable until 2019. On the other hand, at the beginning, 30% of all families used vacuum cleaner, and raised gradually during the mentioned timeframe, 50% in 1940, 70% in 1960 and 100% in 2000. However, 40% of families had washing machine in 1920, highest among all categories. It increased linearly for the next 40 years climbing at 70%, before dipping about at 62% in 1980. Then it increased slowly and reached at its top at the end of the period, although it was lowest in comparison with other types.
On the other hand, families spent 50 hours weekly in 1920, and reduced sharply to 20 hours in 1960. For the rest of the time, the working hours per week remained almost stable, and at the end of the period, it dipped at 10%, the lowest of all time.