The charts illustrate the percentage of families owning electrical appliances the relative amount of time they spend doing housework in nearly a century (1920-2019)
Overall, the families who own three electrical appliances ( washing machine, refrigerator and vacuum cleaner) increased in that period, which led to the reduction in the time each family spent doing housework
According to the first line graph, 40% families had a washing machine in 1920, this percentage generally grew to around 75% in 2019, despite a slight drop between 1960 and 1980. The ownership percentage of refrigerators started at 30% in 1920, while the proportion of family owned vacuum cleaners was 0% in that year. After that, both of the figured surged and the proportion of family owned a refrigator always kept the highest percentages of three from 1940. During the last 19 years, from 2000 to 2019, almost all the households in this country had a refrigerator and vacuum cleaner.
Regarding the second line graph, each family did housework 50 hours per week, this number of hours plummet suddenly to about 15 hours in 1980. From that time onwards, the time for doing housework stayed almost unchanged.