The line graphs illustrate the shifts in the number of households with electrical appliances and time spent on housework per week in a certain country between 1920 and 2019.
Overall, the main feature from the chart is that the percentage of all categories increased significantly during the 100-year period, particularly refrigerators and vacuum cleaners were supplied in all houses except for washing machines. Furthermore, it is clear that these increases made the number of hours of housework reduce consistently.
Looking at the chart more closely, one can see that few refrigerators were used in houses in 1920, whereas the proportion of washing machines and that of vacuum cleaners were 40% and 30% respectively. In the year of 1940, the use of three appliances became similar at the figure from 50% to 60%, as the half of houses used refrigerators. In 1960, 90% of households used a refrigerator and the percentage of other two appliances became same at 70% approximately.
In 1980, refrigerators were supplied in all houses and the use of vacuum cleaners increased steadily, while the portion of households using washing machines experienced a slight drop of 10%. Vacuum cleaner became a necessary appliance in households and the proportion of washing machines saw an increase of 5% roughly in 2000, this trend remained the same during the twenty-year period to 2019.
In terms of hours of chores in households per week, the figure dropped significantly from 50 to 20 between 1920 and 1960. After that, there was a slight change under 20 hours for the fifty-year period from 1960 to 2019.