The first graph illustrates the percentage of houses which owned electrical devices (washing machine, refrigerator and vacuum cleaner) from 1920 to 2019, while the second graph shows the amount of hours spent on house chores per week over the same period.
Overall, it can be clearly seen that all three eletcrical appliances witnessed an upward trend, with the refrigerator showing the most considerable change. Whereas the number of hours spent on housework every week experienced a downward trend.
According to the first chart, devices such as washing machine and vacuum cleaner started at almost the same level in 1920, representing 40% and 30% respectively. This was followed by a gradual increase until 1960, where figures reached the same point, around 70% per week. After decreasing slightly in 1980, the percentage of the former rose, amounting to almost 75% in 2019. The latter surpassed the percentage of households with washing machine, growing to 90% in 1980 and becoming the runner-up. In comparison, the usage of refrigerator was the least popular among all three items, starting at 0% in 1920. However, the figure rocketed to 90% in 1960 and became the leader. In 2000, percentages for vacuum cleaner and refrigerator reached the same level and remained stable until 2019.
Based on the second line graph, the number of hours spent on house chores declined steadily, from 50 hours to around 15 hours in 1980. The figure then showed no changes for a year, between 1980 and 2000. This was followed by a slight drop to 10 hours in 2019.