The first line chart compares the figures for households who had three electrical appliances over a period of 99 years, while the second line graph shows the number of hours that households spent on housework during the same period.
Overall, the time spent on housework saw a significant decline over the period shown, and the electrical appliance ownership rate, at the same time, rose considerably.
In 1920, no one owned a refrigerator, while the percentage of households who possessed a vacuum cleaner and washing machines were 30% and 40%, respectively. In 1980, all households owned a refrigerator, while twenty years later, the vacuum cleaner ownership rate reached 100%. The proportion of washing machine ownership experienced a gradual increase during this period to over 70% in 2019.
The figure for time expenditure among households started at 50 hours per week in 1920, followed by a moderate fall to 20 hours per week in 1960. It slightly decreased over the rest of the period to just over 10 hours per week in 2019.